381565628 has 6 divisors (see below), whose sum is σ = 667739856. Its totient is φ = 190782812.

The previous prime is 381565627. The next prime is 381565637. The reversal of 381565628 is 826565183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381565621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47695700 + ... + 47695707.

It is an arithmetic number, because the mean of its divisors is an integer number (111289976).

Almost surely, 2^381565628 is an apocalyptic number.

It is an amenable number.

381565628 is a deficient number, since it is larger than the sum of its proper divisors (286174228).

381565628 is a wasteful number, since it uses less digits than its factorization.

381565628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95391411 (or 95391409 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The square root of 381565628 is about 19533.7049225179. The cubic root of 381565628 is about 725.3090259307.

The spelling of 381565628 in words is "three hundred eighty-one million, five hundred sixty-five thousand, six hundred twenty-eight".