40421816 has 32 divisors (see below), whose sum is σ = 80600400. Its totient is φ = 18950400.

The previous prime is 40421813. The next prime is 40421819. The reversal of 40421816 is 61812404.

It is an interprime number because it is at equal distance from previous prime (40421813) and next prime (40421819).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421813) 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, 14036 + ... + 16668.

Almost surely, 2^40421816 is an apocalyptic number.

It is an amenable number.

40421816 is a deficient number, since it is larger than the sum of its proper divisors (40178584).

40421816 is a wasteful number, since it uses less digits than its factorization.

40421816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759 (or 2755 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 40421816 is about 6357.8153480579. The cubic root of 40421816 is about 343.1931468612.

The spelling of 40421816 in words is "forty million, four hundred twenty-one thousand, eight hundred sixteen".