40402951 has 4 divisors (see below), whose sum is σ = 41706304. Its totient is φ = 39099600.

The previous prime is 40402933. The next prime is 40402961. The reversal of 40402951 is 15920404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40402951 - 2¹⁷ = 40271879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651630 + ... + 651691.

It is an arithmetic number, because the mean of its divisors is an integer number (10426576).

Almost surely, 2^40402951 is an apocalyptic number.

40402951 is a deficient number, since it is larger than the sum of its proper divisors (1303353).

40402951 is a wasteful number, since it uses less digits than its factorization.

40402951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303352.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 40402951 is about 6356.3315678149. The cubic root of 40402951 is about 343.1397487475.

The spelling of 40402951 in words is "forty million, four hundred two thousand, nine hundred fifty-one".