45039280 has 160 divisors (see below), whose sum is σ = 127991808. Its totient is φ = 14515200.

The previous prime is 45039277. The next prime is 45039287. The reversal of 45039280 is 8293054.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (45039287) 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, 354577 + ... + 354703.

Almost surely, 2^45039280 is an apocalyptic number.

45039280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45039280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63995904).

45039280 is an abundant number, since it is smaller than the sum of its proper divisors (82952528).

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

45039280 is a wasteful number, since it uses less digits than its factorization.

45039280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 45039280 is about 6711.1310522147. The cubic root of 45039280 is about 355.7927927726.

The spelling of 45039280 in words is "forty-five million, thirty-nine thousand, two hundred eighty".