381865542 has 16 divisors (see below), whose sum is σ = 781492800. Its totient is φ = 124328232.

The previous prime is 381865537. The next prime is 381865597. The reversal of 381865542 is 245568183.

It is a junction number, because it is equal to n+sod(n) for n = 381865494 and 381865503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739792 + ... + 740307.

It is an arithmetic number, because the mean of its divisors is an integer number (48843300).

Almost surely, 2^381865542 is an apocalyptic number.

381865542 is an abundant number, since it is smaller than the sum of its proper divisors (399627258).

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

381865542 is a wasteful number, since it uses less digits than its factorization.

381865542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480147.

The product of its digits is 230400, while the sum is 42.

The square root of 381865542 is about 19541.3802480787. The cubic root of 381865542 is about 725.4990092927.

The spelling of 381865542 in words is "three hundred eighty-one million, eight hundred sixty-five thousand, five hundred forty-two".