45138402 has 12 divisors (see below), whose sum is σ = 97799910. Its totient is φ = 15046128.

The previous prime is 45138389. The next prime is 45138407. The reversal of 45138402 is 20483154.

It can be written as a sum of positive squares in only one way, i.e., 41486481 + 3651921 = 6441^2 + 1911^2 .

It is a super-2 number, since 2×45138402² = 4074950670227208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45138407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1253827 + ... + 1253862.

Almost surely, 2^45138402 is an apocalyptic number.

45138402 is an abundant number, since it is smaller than the sum of its proper divisors (52661508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45138402 is a wasteful number, since it uses less digits than its factorization.

45138402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507697 (or 2507694 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 45138402 is about 6718.5118888039. The cubic root of 45138402 is about 356.0536099461.

The spelling of 45138402 in words is "forty-five million, one hundred thirty-eight thousand, four hundred two".