40291880 has 16 divisors (see below), whose sum is σ = 90656820. Its totient is φ = 16116736.

The previous prime is 40291843. The next prime is 40291891. The reversal of 40291880 is 8819204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40271716 + 20164 = 6346^2 + 142^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503609 + ... + 503688.

Almost surely, 2^40291880 is an apocalyptic number.

40291880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40291880 is an abundant number, since it is smaller than the sum of its proper divisors (50364940).

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

40291880 is a wasteful number, since it uses less digits than its factorization.

40291880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007308 (or 1007304 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 40291880 is about 6347.5885184848. The cubic root of 40291880 is about 342.8250204694.

The spelling of 40291880 in words is "forty million, two hundred ninety-one thousand, eight hundred eighty".