399693060 has 72 divisors (see below), whose sum is σ = 1305671640. Its totient is φ = 98385408.

The previous prime is 399693053. The next prime is 399693061. The reversal of 399693060 is 60396993.

It can be written as a sum of positive squares in 4 ways, for example, as 12996 + 399680064 = 114^2 + 19992^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 399692997 and 399693015.

It is not an unprimeable number, because it can be changed into a prime (399693061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83065 + ... + 87744.

Almost surely, 2^399693060 is an apocalyptic number.

399693060 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399693060 is an abundant number, since it is smaller than the sum of its proper divisors (905978580).

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

399693060 is a wasteful number, since it uses less digits than its factorization.

399693060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170837 (or 170832 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 45.

The square root of 399693060 is about 19992.3250273699. The cubic root of 399693060 is about 736.6177887305.

The spelling of 399693060 in words is "three hundred ninety-nine million, six hundred ninety-three thousand, sixty".