307890642 has 8 divisors (see below), whose sum is σ = 615781296. Its totient is φ = 102630212.

The previous prime is 307890641. The next prime is 307890643. The reversal of 307890642 is 246098703.

It is an interprime number because it is at equal distance from previous prime (307890641) and next prime (307890643).

It is a sphenic number, since it is the product of 3 distinct primes.

307890642 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 307890642.

It is not an unprimeable number, because it can be changed into a prime (307890641) 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, 25657548 + ... + 25657559.

It is an arithmetic number, because the mean of its divisors is an integer number (76972662).

Almost surely, 2^307890642 is an apocalyptic number.

307890642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

307890642 is a wasteful number, since it uses less digits than its factorization.

307890642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51315112.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 307890642 is about 17546.8128729978. The cubic root of 307890642 is about 675.2514048433.

The spelling of 307890642 in words is "three hundred seven million, eight hundred ninety thousand, six hundred forty-two".