45251388 has 144 divisors (see below), whose sum is σ = 148395520. Its totient is φ = 11290752.

The previous prime is 45251387. The next prime is 45251411. The reversal of 45251388 is 88315254.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45251387) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61881 + ... + 62607.

Almost surely, 2^45251388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45251388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74197760).

45251388 is an abundant number, since it is smaller than the sum of its proper divisors (103144132).

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

45251388 is a wasteful number, since it uses less digits than its factorization.

45251388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 771 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 45251388 is about 6726.9151919732. The cubic root of 45251388 is about 356.3504418540.

The spelling of 45251388 in words is "forty-five million, two hundred fifty-one thousand, three hundred eighty-eight".