40406292 has 18 divisors (see below), whose sum is σ = 102138218. Its totient is φ = 13468752.

The previous prime is 40406281. The next prime is 40406321. The reversal of 40406292 is 29260404.

It can be written as a sum of positive squares in only one way, i.e., 27185796 + 13220496 = 5214^2 + 3636^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561163 + ... + 561234.

Almost surely, 2^40406292 is an apocalyptic number.

It is an amenable number.

40406292 is an abundant number, since it is smaller than the sum of its proper divisors (61731926).

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

40406292 is a wasteful number, since it uses less digits than its factorization.

40406292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122407 (or 1122402 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 40406292 is about 6356.5943712022. The cubic root of 40406292 is about 343.1492067885.

Adding to 40406292 its reverse (29260404), we get a palindrome (69666696).

The spelling of 40406292 in words is "forty million, four hundred six thousand, two hundred ninety-two".