397448990 has 16 divisors (see below), whose sum is σ = 715635648. Its totient is φ = 158929056.

The previous prime is 397448951. The next prime is 397449029. The reversal of 397448990 is 99844793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (397448951) and next prime (397449029).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55664 + ... + 62396.

It is an arithmetic number, because the mean of its divisors is an integer number (44727228).

Almost surely, 2^397448990 is an apocalyptic number.

397448990 is a deficient number, since it is larger than the sum of its proper divisors (318186658).

397448990 is a wasteful number, since it uses less digits than its factorization.

397448990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12643.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 397448990 is about 19936.1227423990. The cubic root of 397448990 is about 735.2366245707.

The spelling of 397448990 in words is "three hundred ninety-seven million, four hundred forty-eight thousand, nine hundred ninety".