45721472 has 16 divisors (see below), whose sum is σ = 91086000. Its totient is φ = 22860672.

The previous prime is 45721471. The next prime is 45721523. The reversal of 45721472 is 27412754.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45721471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178472 + ... + 178727.

It is an arithmetic number, because the mean of its divisors is an integer number (5692875).

Almost surely, 2^45721472 is an apocalyptic number.

It is an amenable number.

45721472 is a deficient number, since it is larger than the sum of its proper divisors (45364528).

45721472 is an equidigital number, since it uses as much as digits as its factorization.

45721472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357213 (or 357201 counting only the distinct ones).

The product of its digits is 15680, while the sum is 32.

The square root of 45721472 is about 6761.7654499398. The cubic root of 45721472 is about 357.5801492750.

The spelling of 45721472 in words is "forty-five million, seven hundred twenty-one thousand, four hundred seventy-two".