305638494 has 32 divisors (see below), whose sum is σ = 703067136. Its totient is φ = 86767200.

The previous prime is 305638493. The next prime is 305638499. The reversal of 305638494 is 494836503.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305638493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16582 + ... + 29769.

It is an arithmetic number, because the mean of its divisors is an integer number (21970848).

Almost surely, 2^305638494 is an apocalyptic number.

305638494 is an abundant number, since it is smaller than the sum of its proper divisors (397428642).

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

305638494 is a wasteful number, since it uses less digits than its factorization.

305638494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46520.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 305638494 is about 17482.5196696586. The cubic root of 305638494 is about 673.6009386806.

The spelling of 305638494 in words is "three hundred five million, six hundred thirty-eight thousand, four hundred ninety-four".