40402645 has 8 divisors (see below), whose sum is σ = 51035040. Its totient is φ = 30620880.

The previous prime is 40402643. The next prime is 40402667. The reversal of 40402645 is 54620404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40402645 - 2¹ = 40402643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402643) 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, 212551 + ... + 212740.

It is an arithmetic number, because the mean of its divisors is an integer number (6379380).

Almost surely, 2^40402645 is an apocalyptic number.

It is an amenable number.

40402645 is a deficient number, since it is larger than the sum of its proper divisors (10632395).

40402645 is a wasteful number, since it uses less digits than its factorization.

40402645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425315.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 40402645 is about 6356.3074972817. The cubic root of 40402645 is about 343.1388824657.

The spelling of 40402645 in words is "forty million, four hundred two thousand, six hundred forty-five".