142077840 has 160 divisors (see below), whose sum is σ = 472469760. Its totient is φ = 35192832.

The previous prime is 142077829. The next prime is 142077847. The reversal of 142077840 is 48770241.

It is a super-2 number, since 2×142077840² = 40372225238131200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142077847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 395581 + ... + 395939.

It is an arithmetic number, because the mean of its divisors is an integer number (2952936).

Almost surely, 2^142077840 is an apocalyptic number.

142077840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142077840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236234880).

142077840 is an abundant number, since it is smaller than the sum of its proper divisors (330391920).

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

142077840 is a wasteful number, since it uses less digits than its factorization.

142077840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 142077840 is about 11919.6409341893. The cubic root of 142077840 is about 521.8056556960.

The spelling of 142077840 in words is "one hundred forty-two million, seventy-seven thousand, eight hundred forty".