397969020 has 36 divisors (see below), whose sum is σ = 1207173240. Its totient is φ = 106125024.

The previous prime is 397968953. The next prime is 397969021. The reversal of 397969020 is 20969793.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397969021) 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, 1105290 + ... + 1105649.

It is an arithmetic number, because the mean of its divisors is an integer number (33532590).

Almost surely, 2^397969020 is an apocalyptic number.

397969020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

397969020 is an abundant number, since it is smaller than the sum of its proper divisors (809204220).

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

397969020 is a wasteful number, since it uses less digits than its factorization.

397969020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2210954 (or 2210949 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 397969020 is about 19949.1608846087. The cubic root of 397969020 is about 735.5571507906.

The spelling of 397969020 in words is "three hundred ninety-seven million, nine hundred sixty-nine thousand, twenty".