45209970 has 96 divisors (see below), whose sum is σ = 134093232. Its totient is φ = 10469376.

The previous prime is 45209959. The next prime is 45209971. The reversal of 45209970 is 7990254.

It can be written as a sum of positive squares in 8 ways, for example, as 27342441 + 17867529 = 5229^2 + 4227^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (45209971) 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, 18754 + ... + 21026.

Almost surely, 2^45209970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45209970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67046616).

45209970 is an abundant number, since it is smaller than the sum of its proper divisors (88883262).

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

45209970 is a wasteful number, since it uses less digits than its factorization.

45209970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 45209970 is about 6723.8359587366. The cubic root of 45209970 is about 356.2416877100.

The spelling of 45209970 in words is "forty-five million, two hundred nine thousand, nine hundred seventy".