307942840 has 48 divisors (see below), whose sum is σ = 716032440. Its totient is φ = 119188800.

The previous prime is 307942807. The next prime is 307942847. The reversal of 307942840 is 48249703.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 307942840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307942847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34435 + ... + 42445.

Almost surely, 2^307942840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 307942840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358016220).

307942840 is an abundant number, since it is smaller than the sum of its proper divisors (408089600).

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

307942840 is a wasteful number, since it uses less digits than its factorization.

307942840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8084 (or 8049 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 307942840 is about 17548.3002025837. The cubic root of 307942840 is about 675.2895620939.

The spelling of 307942840 in words is "three hundred seven million, nine hundred forty-two thousand, eight hundred forty".