397422740 has 48 divisors (see below), whose sum is σ = 980501760. Its totient is φ = 133399680.

The previous prime is 397422733. The next prime is 397422743. The reversal of 397422740 is 47224793.

It is a junction number, because it is equal to n+sod(n) for n = 397422694 and 397422703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397422743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66620 + ... + 72339.

It is an arithmetic number, because the mean of its divisors is an integer number (20427120).

Almost surely, 2^397422740 is an apocalyptic number.

It is an amenable number.

397422740 is an abundant number, since it is smaller than the sum of its proper divisors (583079020).

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

397422740 is a wasteful number, since it uses less digits than its factorization.

397422740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138992 (or 138990 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 397422740 is about 19935.4643788400. The cubic root of 397422740 is about 735.2204376832.

The spelling of 397422740 in words is "three hundred ninety-seven million, four hundred twenty-two thousand, seven hundred forty".