40499980 has 24 divisors (see below), whose sum is σ = 87029712. Its totient is φ = 15822912.

The previous prime is 40499939. The next prime is 40499983. The reversal of 40499980 is 8999404.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (40499983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22687 + ... + 24406.

It is an arithmetic number, because the mean of its divisors is an integer number (3626238).

Almost surely, 2^40499980 is an apocalyptic number.

It is an amenable number.

40499980 is an abundant number, since it is smaller than the sum of its proper divisors (46529732).

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

40499980 is a wasteful number, since it uses less digits than its factorization.

40499980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47145 (or 47143 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 40499980 is about 6363.9594593303. The cubic root of 40499980 is about 343.4142162369.

The spelling of 40499980 in words is "forty million, four hundred ninety-nine thousand, nine hundred eighty".