307886916402 has 80 divisors (see below), whose sum is σ = 744070967640. Its totient is φ = 94593235968.

The previous prime is 307886916397. The next prime is 307886916413. The reversal of 307886916402 is 204619688703.

307886916402 is a `hidden beast` number, since 3 + 0 + 78 + 86 + 91 + 6 + 402 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 93146429601 + 214740486801 = 305199^2 + 463401^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1308724 + ... + 1525952.

Almost surely, 2^307886916402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 307886916402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372035483820).

307886916402 is an abundant number, since it is smaller than the sum of its proper divisors (436184051238).

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

307886916402 is a wasteful number, since it uses less digits than its factorization.

307886916402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217929 (or 217920 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 307886916402 in words is "three hundred seven billion, eight hundred eighty-six million, nine hundred sixteen thousand, four hundred two".