397886936832 has 1728 divisors, whose sum is σ = 1609363840000. Its totient is φ = 96566722560.

The previous prime is 397886936801. The next prime is 397886936857. The reversal of 397886936832 is 238639688793.

It is a tau number, because it is divible by the number of its divisors (1728).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5450505948 + ... + 5450506020.

Almost surely, 2^397886936832 is an apocalyptic number.

397886936832 is a gapful number since it is divisible by the number (32) 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 397886936832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804681920000).

397886936832 is an abundant number, since it is smaller than the sum of its proper divisors (1211476903168).

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

397886936832 is a wasteful number, since it uses less digits than its factorization.

397886936832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 115 counting only the distinct ones).

The product of its digits is 564350976, while the sum is 72.

The spelling of 397886936832 in words is "three hundred ninety-seven billion, eight hundred eighty-six million, nine hundred thirty-six thousand, eight hundred thirty-two".