397133436 has 72 divisors (see below), whose sum is σ = 1112756736. Its totient is φ = 109801440.

The previous prime is 397133431. The next prime is 397133441. The reversal of 397133436 is 634331793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (397133431) and next prime (397133441).

It is a junction number, because it is equal to n+sod(n) for n = 397133394 and 397133403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397133431) 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, 7335 + ... + 29121.

Almost surely, 2^397133436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397133436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (556378368).

397133436 is an abundant number, since it is smaller than the sum of its proper divisors (715623300).

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

397133436 is a wasteful number, since it uses less digits than its factorization.

397133436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21839 (or 21830 counting only the distinct ones).

The product of its digits is 122472, while the sum is 39.

The square root of 397133436 is about 19928.2070442878. The cubic root of 397133436 is about 735.0419930656.

The spelling of 397133436 in words is "three hundred ninety-seven million, one hundred thirty-three thousand, four hundred thirty-six".