40402332 has 18 divisors (see below), whose sum is σ = 102128208. Its totient is φ = 13467432.

The previous prime is 40402309. The next prime is 40402333. The reversal of 40402332 is 23320404.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561108 + ... + 561179.

Almost surely, 2^40402332 is an apocalyptic number.

It is an amenable number.

40402332 is an abundant number, since it is smaller than the sum of its proper divisors (61725876).

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

40402332 is a wasteful number, since it uses less digits than its factorization.

40402332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122297 (or 1122292 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 40402332 is about 6356.2828760212. The cubic root of 40402332 is about 343.1379963624.

Adding to 40402332 its reverse (23320404), we get a palindrome (63722736).

The spelling of 40402332 in words is "forty million, four hundred two thousand, three hundred thirty-two".