40642628 has 12 divisors (see below), whose sum is σ = 76595820. Its totient is φ = 18758112.

The previous prime is 40642607. The next prime is 40642649. The reversal of 40642628 is 82624604.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40642607) and next prime (40642649).

It can be written as a sum of positive squares in 2 ways, for example, as 7441984 + 33200644 = 2728^2 + 5762^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40642594 and 40642603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390743 + ... + 390846.

It is an arithmetic number, because the mean of its divisors is an integer number (6382985).

Almost surely, 2^40642628 is an apocalyptic number.

It is an amenable number.

40642628 is a deficient number, since it is larger than the sum of its proper divisors (35953192).

40642628 is a wasteful number, since it uses less digits than its factorization.

40642628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781606 (or 781604 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 40642628 is about 6375.1570961036. The cubic root of 40642628 is about 343.8169320686.

It can be divided in two parts, 406 and 42628, that added together give a palindrome (43034).

The spelling of 40642628 in words is "forty million, six hundred forty-two thousand, six hundred twenty-eight".