40398516 has 18 divisors (see below), whose sum is σ = 102118562. Its totient is φ = 13466160.

The previous prime is 40398481. The next prime is 40398551. The reversal of 40398516 is 61589304.

40398516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40398481) and next prime (40398551).

It can be written as a sum of positive squares in only one way, i.e., 33108516 + 7290000 = 5754^2 + 2700^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1122181 = 40398516 / (4 + 0 + 3 + 9 + 8 + 5 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561055 + ... + 561126.

Almost surely, 2^40398516 is an apocalyptic number.

It is an amenable number.

40398516 is an abundant number, since it is smaller than the sum of its proper divisors (61720046).

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

40398516 is a wasteful number, since it uses less digits than its factorization.

40398516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122191 (or 1122186 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 40398516 is about 6355.9826934944. The cubic root of 40398516 is about 343.1271928951.

The spelling of 40398516 in words is "forty million, three hundred ninety-eight thousand, five hundred sixteen".