397469936736 has 288 divisors, whose sum is σ = 1185993139968. Its totient is φ = 130937264640.

The previous prime is 397469936713. The next prime is 397469936767. The reversal of 397469936736 is 637639964793.

397469936736 is a `hidden beast` number, since 3 + 9 + 7 + 469 + 93 + 6 + 73 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257594781 + ... + 257596323.

It is an arithmetic number, because the mean of its divisors is an integer number (4118031736).

Almost surely, 2^397469936736 is an apocalyptic number.

397469936736 is a gapful number since it is divisible by the number (36) 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 397469936736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (592996569984).

397469936736 is an abundant number, since it is smaller than the sum of its proper divisors (788523203232).

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

397469936736 is a wasteful number, since it uses less digits than its factorization.

397469936736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936 (or 1916 counting only the distinct ones).

The product of its digits is 833299488, while the sum is 72.

The spelling of 397469936736 in words is "three hundred ninety-seven billion, four hundred sixty-nine million, nine hundred thirty-six thousand, seven hundred thirty-six".