40469988 has 48 divisors (see below), whose sum is σ = 103440960. Its totient is φ = 12238464.

The previous prime is 40469987. The next prime is 40470029. The reversal of 40469988 is 88996404.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (40469987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7006 + ... + 11402.

It is an arithmetic number, because the mean of its divisors is an integer number (2155020).

Almost surely, 2^40469988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40469988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51720480).

40469988 is an abundant number, since it is smaller than the sum of its proper divisors (62970972).

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

40469988 is a wasteful number, since it uses less digits than its factorization.

40469988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476 (or 4474 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 40469988 is about 6361.6026282691. The cubic root of 40469988 is about 343.3294242389.

The spelling of 40469988 in words is "forty million, four hundred sixty-nine thousand, nine hundred eighty-eight".