45637994 has 8 divisors (see below), whose sum is σ = 69394980. Its totient is φ = 22506336.

The previous prime is 45637993. The next prime is 45637997. The reversal of 45637994 is 49973654.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 39853969 + 5784025 = 6313^2 + 2405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (45637993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156149 + ... + 156440.

Almost surely, 2^45637994 is an apocalyptic number.

45637994 is a deficient number, since it is larger than the sum of its proper divisors (23756986).

45637994 is a wasteful number, since it uses less digits than its factorization.

45637994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312664.

The product of its digits is 816480, while the sum is 47.

The square root of 45637994 is about 6755.5898336119. The cubic root of 45637994 is about 357.3623941041.

The spelling of 45637994 in words is "forty-five million, six hundred thirty-seven thousand, nine hundred ninety-four".