45638739 has 24 divisors (see below), whose sum is σ = 70267392. Its totient is φ = 28477680.

The previous prime is 45638731. The next prime is 45638753. The reversal of 45638739 is 93783654.

45638739 is a `hidden beast` number, since 4 + 5 + 638 + 7 + 3 + 9 = 666.

It is not a de Polignac number, because 45638739 - 2³ = 45638731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45638694 and 45638703.

It is not an unprimeable number, because it can be changed into a prime (45638731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7384 + ... + 12074.

It is an arithmetic number, because the mean of its divisors is an integer number (2927808).

Almost surely, 2^45638739 is an apocalyptic number.

45638739 is a deficient number, since it is larger than the sum of its proper divisors (24628653).

45638739 is a wasteful number, since it uses less digits than its factorization.

45638739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4767 (or 4764 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 45638739 is about 6755.6449729097. The cubic root of 45638739 is about 357.3643386355.

The spelling of 45638739 in words is "forty-five million, six hundred thirty-eight thousand, seven hundred thirty-nine".