397775026333440 has 2160 divisors, whose sum is σ = 1744974438863040. Its totient is φ = 84719293562880.

The previous prime is 397775026333423. The next prime is 397775026333457. The reversal of 397775026333440 is 44333620577793.

397775026333440 is a `hidden beast` number, since 3 + 9 + 77 + 75 + 0 + 26 + 3 + 33 + 440 = 666.

It is an interprime number because it is at equal distance from previous prime (397775026333423) and next prime (397775026333457).

It is a tau number, because it is divible by the number of its divisors (2160).

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 15981948516 + ... + 15981973404.

Almost surely, 2^{397775026333440} is an apocalyptic number.

397775026333440 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 397775026333440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872487219431520).

397775026333440 is an abundant number, since it is smaller than the sum of its proper divisors (1347199412529600).

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

397775026333440 is a wasteful number, since it uses less digits than its factorization.

397775026333440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25028 (or 24986 counting only the distinct ones).

The product of its (nonzero) digits is 240045120, while the sum is 63.

The spelling of 397775026333440 in words is "three hundred ninety-seven trillion, seven hundred seventy-five billion, twenty-six million, three hundred thirty-three thousand, four hundred forty".