45081390 has 32 divisors (see below), whose sum is σ = 108563616. Its totient is φ = 11980800.

The previous prime is 45081389. The next prime is 45081391. The reversal of 45081390 is 9318054.

It is an interprime number because it is at equal distance from previous prime (45081389) and next prime (45081391).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45081391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6990 + ... + 11790.

It is an arithmetic number, because the mean of its divisors is an integer number (3392613).

Almost surely, 2^45081390 is an apocalyptic number.

45081390 is an abundant number, since it is smaller than the sum of its proper divisors (63482226).

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

45081390 is a wasteful number, since it uses less digits than its factorization.

45081390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 45081390 is about 6714.2676443526. The cubic root of 45081390 is about 355.9036424398.

The spelling of 45081390 in words is "forty-five million, eighty-one thousand, three hundred ninety".