307629940 has 12 divisors (see below), whose sum is σ = 646022916. Its totient is φ = 123051968.

The previous prime is 307629923. The next prime is 307629947. The reversal of 307629940 is 49926703.

It can be written as a sum of positive squares in 2 ways, for example, as 182682256 + 124947684 = 13516^2 + 11178^2 .

It is a junction number, because it is equal to n+sod(n) for n = 307629893 and 307629902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (307629947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7690729 + ... + 7690768.

It is an arithmetic number, because the mean of its divisors is an integer number (53835243).

Almost surely, 2^307629940 is an apocalyptic number.

It is an amenable number.

307629940 is an abundant number, since it is smaller than the sum of its proper divisors (338392976).

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

307629940 is a wasteful number, since it uses less digits than its factorization.

307629940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15381506 (or 15381504 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 307629940 is about 17539.3825432938. The cubic root of 307629940 is about 675.0607645343.

The spelling of 307629940 in words is "three hundred seven million, six hundred twenty-nine thousand, nine hundred forty".