398929772 has 6 divisors (see below), whose sum is σ = 698127108. Its totient is φ = 199464884.

The previous prime is 398929763. The next prime is 398929787. The reversal of 398929772 is 277929893.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49866218 + ... + 49866225.

It is an arithmetic number, because the mean of its divisors is an integer number (116354518).

Almost surely, 2^398929772 is an apocalyptic number.

It is an amenable number.

398929772 is a deficient number, since it is larger than the sum of its proper divisors (299197336).

398929772 is a wasteful number, since it uses less digits than its factorization.

398929772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99732447 (or 99732445 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 56.

The square root of 398929772 is about 19973.2263793309. The cubic root of 398929772 is about 736.1485871831.

The spelling of 398929772 in words is "three hundred ninety-eight million, nine hundred twenty-nine thousand, seven hundred seventy-two".