396979700 has 36 divisors (see below), whose sum is σ = 927714060. Its totient is φ = 146576640.

The previous prime is 396979669. The next prime is 396979703. The reversal of 396979700 is 7979693.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 32398864 + 364580836 = 5692^2 + 19094^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396979703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151385 + ... + 153984.

It is an arithmetic number, because the mean of its divisors is an integer number (25769835).

Almost surely, 2^396979700 is an apocalyptic number.

It is an amenable number.

396979700 is an abundant number, since it is smaller than the sum of its proper divisors (530734360).

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

396979700 is a wasteful number, since it uses less digits than its factorization.

396979700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305396 (or 305389 counting only the distinct ones).

The product of its (nonzero) digits is 642978, while the sum is 50.

The square root of 396979700 is about 19924.3494247617. The cubic root of 396979700 is about 734.9471324215.

The spelling of 396979700 in words is "three hundred ninety-six million, nine hundred seventy-nine thousand, seven hundred".