45009390 has 128 divisors (see below), whose sum is σ = 121347072. Its totient is φ = 10644480.

The previous prime is 45009379. The next prime is 45009403. The reversal of 45009390 is 9390054.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1046709 + ... + 1046751.

It is an arithmetic number, because the mean of its divisors is an integer number (948024).

Almost surely, 2^45009390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45009390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60673536).

45009390 is an abundant number, since it is smaller than the sum of its proper divisors (76337682).

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

45009390 is a wasteful number, since it uses less digits than its factorization.

45009390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 45009390 is about 6708.9037852692. The cubic root of 45009390 is about 355.7140688974.

The spelling of 45009390 in words is "forty-five million, nine thousand, three hundred ninety".