45638187 has 32 divisors (see below), whose sum is σ = 73804800. Its totient is φ = 24520320.

The previous prime is 45638147. The next prime is 45638227. The reversal of 45638187 is 78183654.

It is an interprime number because it is at equal distance from previous prime (45638147) and next prime (45638227).

It is not a de Polignac number, because 45638187 - 2¹⁴ = 45621803 is a prime.

It is a super-2 number, since 2×45638187² = 4165688225293938, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (45638147) 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, 28689 + ... + 30237.

It is an arithmetic number, because the mean of its divisors is an integer number (2306400).

Almost surely, 2^45638187 is an apocalyptic number.

45638187 is a deficient number, since it is larger than the sum of its proper divisors (28166613).

45638187 is a wasteful number, since it uses less digits than its factorization.

45638187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643.

The product of its digits is 161280, while the sum is 42.

The square root of 45638187 is about 6755.6041180638. The cubic root of 45638187 is about 357.3628978572.

The spelling of 45638187 in words is "forty-five million, six hundred thirty-eight thousand, one hundred eighty-seven".