392642140 has 24 divisors (see below), whose sum is σ = 899507952. Its totient is φ = 142778880.

The previous prime is 392642123. The next prime is 392642161. The reversal of 392642140 is 41246293.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 892149 + ... + 892588.

It is an arithmetic number, because the mean of its divisors is an integer number (37479498).

Almost surely, 2^392642140 is an apocalyptic number.

It is an amenable number.

392642140 is an abundant number, since it is smaller than the sum of its proper divisors (506865812).

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

392642140 is a wasteful number, since it uses less digits than its factorization.

392642140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784757 (or 1784755 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 392642140 is about 19815.1997214260. The cubic root of 392642140 is about 732.2605475596.

The spelling of 392642140 in words is "three hundred ninety-two million, six hundred forty-two thousand, one hundred forty".