45278280 has 96 divisors (see below), whose sum is σ = 152263800. Its totient is φ = 11655168.

The previous prime is 45278257. The next prime is 45278281. The reversal of 45278280 is 8287254.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22410756 + 22867524 = 4734^2 + 4782^2 .

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

It is not an unprimeable number, because it can be changed into a prime (45278281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8272 + ... + 12608.

Almost surely, 2^45278280 is an apocalyptic number.

45278280 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 45278280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76131900).

45278280 is an abundant number, since it is smaller than the sum of its proper divisors (106985520).

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

45278280 is a wasteful number, since it uses less digits than its factorization.

45278280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4383 (or 4376 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 45278280 is about 6728.9137310564. The cubic root of 45278280 is about 356.4210185354.

The spelling of 45278280 in words is "forty-five million, two hundred seventy-eight thousand, two hundred eighty".