394749642 has 16 divisors (see below), whose sum is σ = 902284992. Its totient is φ = 112785600.

The previous prime is 394749631. The next prime is 394749647. The reversal of 394749642 is 246947493.

It is a junction number, because it is equal to n+sod(n) for n = 394749591 and 394749600.

It is not an unprimeable number, because it can be changed into a prime (394749647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4699359 + ... + 4699442.

It is an arithmetic number, because the mean of its divisors is an integer number (56392812).

Almost surely, 2^394749642 is an apocalyptic number.

394749642 is an abundant number, since it is smaller than the sum of its proper divisors (507535350).

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

394749642 is a wasteful number, since it uses less digits than its factorization.

394749642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9398813.

The product of its digits is 1306368, while the sum is 48.

The square root of 394749642 is about 19868.3074769845. The cubic root of 394749642 is about 733.5683437326.

The spelling of 394749642 in words is "three hundred ninety-four million, seven hundred forty-nine thousand, six hundred forty-two".