145894770 has 128 divisors (see below), whose sum is σ = 450593280. Its totient is φ = 33312384.

The previous prime is 145894759. The next prime is 145894781. The reversal of 145894770 is 77498541.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (145894759) and next prime (145894781).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a zygodrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 152614 + ... + 153566.

It is an arithmetic number, because the mean of its divisors is an integer number (3520260).

Almost surely, 2^145894770 is an apocalyptic number.

145894770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 145894770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225296640).

145894770 is an abundant number, since it is smaller than the sum of its proper divisors (304698510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145894770 is an frugal number, since it uses more digits than its factorization.

145894770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 145894770 is about 12078.6907403079. The cubic root of 145894770 is about 526.4372048711.

The spelling of 145894770 in words is "one hundred forty-five million, eight hundred ninety-four thousand, seven hundred seventy".