45049939 has 32 divisors (see below), whose sum is σ = 54286848. Its totient is φ = 36960000.

The previous prime is 45049937. The next prime is 45049951. The reversal of 45049939 is 93994054.

It is not a de Polignac number, because 45049939 - 2¹ = 45049937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 45049895 and 45049904.

It is not an unprimeable number, because it can be changed into a prime (45049933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445989 + ... + 446089.

It is an arithmetic number, because the mean of its divisors is an integer number (1696464).

Almost surely, 2^45049939 is an apocalyptic number.

45049939 is a deficient number, since it is larger than the sum of its proper divisors (9236909).

45049939 is a wasteful number, since it uses less digits than its factorization.

45049939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219.

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 45049939 is about 6711.9251336707. The cubic root of 45049939 is about 355.8208578767.

The spelling of 45049939 in words is "forty-five million, forty-nine thousand, nine hundred thirty-nine".