40499280 has 60 divisors (see below), whose sum is σ = 136012500. Its totient is φ = 10799616.

The previous prime is 40499233. The next prime is 40499309. The reversal of 40499280 is 8299404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27625536 + 12873744 = 5256^2 + 3588^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27405 + ... + 28844.

It is an arithmetic number, because the mean of its divisors is an integer number (2266875).

Almost surely, 2^40499280 is an apocalyptic number.

40499280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40499280 is an abundant number, since it is smaller than the sum of its proper divisors (95513220).

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

40499280 is a wasteful number, since it uses less digits than its factorization.

40499280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56268 (or 56259 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 40499280 is about 6363.9044618850. The cubic root of 40499280 is about 343.4122377064.

The spelling of 40499280 in words is "forty million, four hundred ninety-nine thousand, two hundred eighty".