102157444 has 24 divisors (see below), whose sum is σ = 191596608. Its totient is φ = 47535840.

The previous prime is 102157439. The next prime is 102157453. The reversal of 102157444 is 444751201.

It is a super-2 number, since 2×102157444² = 20872286729226272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11602 + ... + 18409.

It is an arithmetic number, because the mean of its divisors is an integer number (7983192).

Almost surely, 2^102157444 is an apocalyptic number.

It is an amenable number.

102157444 is a deficient number, since it is larger than the sum of its proper divisors (89439164).

102157444 is a wasteful number, since it uses less digits than its factorization.

102157444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30075 (or 30073 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 102157444 is about 10107.2965722789. The cubic root of 102157444 is about 467.4731512506.

The spelling of 102157444 in words is "one hundred two million, one hundred fifty-seven thousand, four hundred forty-four".