381145356 has 72 divisors (see below), whose sum is σ = 976719744. Its totient is φ = 125314560.

The previous prime is 381145333. The next prime is 381145381. The reversal of 381145356 is 653541183.

381145356 is a `hidden beast` number, since 3 + 8 + 114 + 535 + 6 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 381145356.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1581396 + ... + 1581636.

It is an arithmetic number, because the mean of its divisors is an integer number (13565552).

Almost surely, 2^381145356 is an apocalyptic number.

381145356 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

381145356 is an abundant number, since it is smaller than the sum of its proper divisors (595574388).

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

381145356 is a wasteful number, since it uses less digits than its factorization.

381145356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 666 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 381145356 is about 19522.9443476131. The cubic root of 381145356 is about 725.0426330855.

It can be divided in two parts, 381145 and 356, that added together give a triangular number (381501 = T₈₇₃).

The spelling of 381145356 in words is "three hundred eighty-one million, one hundred forty-five thousand, three hundred fifty-six".