397553540 has 24 divisors (see below), whose sum is σ = 838828032. Its totient is φ = 158266080.

The previous prime is 397553539. The next prime is 397553543. The reversal of 397553540 is 45355793.

It is a happy number.

397553540 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (397553543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42884 + ... + 51323.

It is an arithmetic number, because the mean of its divisors is an integer number (34951168).

Almost surely, 2^397553540 is an apocalyptic number.

It is an amenable number.

397553540 is an abundant number, since it is smaller than the sum of its proper divisors (441274492).

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

397553540 is a wasteful number, since it uses less digits than its factorization.

397553540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94427 (or 94425 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 41.

The square root of 397553540 is about 19938.7446946893. The cubic root of 397553540 is about 735.3010875600.

The spelling of 397553540 in words is "three hundred ninety-seven million, five hundred fifty-three thousand, five hundred forty".