103072644 has 72 divisors (see below), whose sum is σ = 283162880. Its totient is φ = 31492800.

The previous prime is 103072633. The next prime is 103072667. The reversal of 103072644 is 446270301.

103072644 is a `hidden beast` number, since 10 + 3 + 0 + 7 + 2 + 644 = 666.

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, 18774 + ... + 23634.

Almost surely, 2^103072644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 103072644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141581440).

103072644 is an abundant number, since it is smaller than the sum of its proper divisors (180090236).

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

103072644 is a wasteful number, since it uses less digits than its factorization.

103072644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4921 (or 4916 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 103072644 is about 10152.4698472835. The cubic root of 103072644 is about 468.8649902425.

The spelling of 103072644 in words is "one hundred three million, seventy-two thousand, six hundred forty-four".