397950537600 has 1920 divisors, whose sum is σ = 1857058283520. Its totient is φ = 81517363200.

The previous prime is 397950537557. The next prime is 397950537623. The reversal of 397950537600 is 6735059793.

397950537600 is a `hidden beast` number, since 3 + 9 + 79 + 505 + 3 + 7 + 60 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a super-2 number, since 2×397950537600² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 2534716722 + ... + 2534716878.

It is an arithmetic number, because the mean of its divisors is an integer number (967217856).

Almost surely, 2^397950537600 is an apocalyptic number.

397950537600 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397950537600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928529141760).

397950537600 is an abundant number, since it is smaller than the sum of its proper divisors (1459107745920).

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

397950537600 is a wasteful number, since it uses less digits than its factorization.

397950537600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 5358150, while the sum is 54.

The spelling of 397950537600 in words is "three hundred ninety-seven billion, nine hundred fifty million, five hundred thirty-seven thousand, six hundred".