381273426 has 32 divisors (see below), whose sum is σ = 849744000. Its totient is φ = 126720720.

The previous prime is 381273407. The next prime is 381273427. The reversal of 381273426 is 624372183.

It is a happy number.

381273426 is a `hidden beast` number, since 381 + 273 + 4 + 2 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (381273427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8731 + ... + 28961.

It is an arithmetic number, because the mean of its divisors is an integer number (26554500).

Almost surely, 2^381273426 is an apocalyptic number.

381273426 is an abundant number, since it is smaller than the sum of its proper divisors (468470574).

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

381273426 is a wasteful number, since it uses less digits than its factorization.

381273426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20591 (or 20585 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 381273426 is about 19526.2240589419. The cubic root of 381273426 is about 725.1238320386.

The spelling of 381273426 in words is "three hundred eighty-one million, two hundred seventy-three thousand, four hundred twenty-six".