399773222400 has 480 divisors, whose sum is σ = 1396646608896. Its totient is φ = 100638720000.

The previous prime is 399773222383. The next prime is 399773222473. The reversal of 399773222400 is 4222377993.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 399773222400.

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, 48802305 + ... + 48810495.

Almost surely, 2^399773222400 is an apocalyptic number.

399773222400 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 399773222400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698323304448).

399773222400 is an abundant number, since it is smaller than the sum of its proper divisors (996873386496).

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

399773222400 is a wasteful number, since it uses less digits than its factorization.

399773222400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8294 (or 8273 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 48.

The spelling of 399773222400 in words is "three hundred ninety-nine billion, seven hundred seventy-three million, two hundred twenty-two thousand, four hundred".