397726534 has 12 divisors (see below), whose sum is σ = 623657916. Its totient is φ = 190216532.

The previous prime is 397726531. The next prime is 397726541. The reversal of 397726534 is 435627793.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397726531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 186904 + ... + 189019.

It is an arithmetic number, because the mean of its divisors is an integer number (51971493).

Almost surely, 2^397726534 is an apocalyptic number.

397726534 is a deficient number, since it is larger than the sum of its proper divisors (225931382).

397726534 is a wasteful number, since it uses less digits than its factorization.

397726534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375971 (or 375948 counting only the distinct ones).

The product of its digits is 952560, while the sum is 46.

The square root of 397726534 is about 19943.0823595552. The cubic root of 397726534 is about 735.4077266391.

The spelling of 397726534 in words is "three hundred ninety-seven million, seven hundred twenty-six thousand, five hundred thirty-four".