45438280 has 32 divisors (see below), whose sum is σ = 108251640. Its totient is φ = 17105920.

The previous prime is 45438269. The next prime is 45438307. The reversal of 45438280 is 8283454.

It can be written as a sum of positive squares in 4 ways, for example, as 34269316 + 11168964 = 5854^2 + 3342^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 32731 + ... + 34090.

Almost surely, 2^45438280 is an apocalyptic number.

45438280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

45438280 is an abundant number, since it is smaller than the sum of its proper divisors (62813360).

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

45438280 is a wasteful number, since it uses less digits than its factorization.

45438280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66849 (or 66845 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 45438280 is about 6740.7922383055. The cubic root of 45438280 is about 356.8403536775.

The spelling of 45438280 in words is "forty-five million, four hundred thirty-eight thousand, two hundred eighty".