381626400 has 144 divisors (see below), whose sum is σ = 1307728800. Its totient is φ = 96399360.

The previous prime is 381626369. The next prime is 381626411. The reversal of 381626400 is 4626183.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41416 + ... + 49784.

It is an arithmetic number, because the mean of its divisors is an integer number (9081450).

Almost surely, 2^381626400 is an apocalyptic number.

381626400 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 381626400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (653864400).

381626400 is an abundant number, since it is smaller than the sum of its proper divisors (926102400).

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

381626400 is a wasteful number, since it uses less digits than its factorization.

381626400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8411 (or 8398 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 381626400 is about 19535.2604282615. The cubic root of 381626400 is about 725.3475305696.

The spelling of 381626400 in words is "three hundred eighty-one million, six hundred twenty-six thousand, four hundred".