45147280 has 40 divisors (see below), whose sum is σ = 106546752. Its totient is φ = 17787264.

The previous prime is 45147247. The next prime is 45147293. The reversal of 45147280 is 8274154.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149 + ... + 9571.

Almost surely, 2^45147280 is an apocalyptic number.

45147280 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 45147280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53273376).

45147280 is an abundant number, since it is smaller than the sum of its proper divisors (61399472).

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

45147280 is a wasteful number, since it uses less digits than its factorization.

45147280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8503 (or 8497 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 45147280 is about 6719.1725681069. The cubic root of 45147280 is about 356.0769517614.

The spelling of 45147280 in words is "forty-five million, one hundred forty-seven thousand, two hundred eighty".