40454816 has 12 divisors (see below), whose sum is σ = 79645482. Its totient is φ = 20227392.

The previous prime is 40454789. The next prime is 40454929. The reversal of 40454816 is 61845404.

It can be written as a sum of positive squares in only one way, i.e., 22848400 + 17606416 = 4780^2 + 4196^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 1264213 = 40454816 / (4 + 0 + 4 + 5 + 4 + 8 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632075 + ... + 632138.

Almost surely, 2^40454816 is an apocalyptic number.

It is an amenable number.

40454816 is a deficient number, since it is larger than the sum of its proper divisors (39190666).

40454816 is a wasteful number, since it uses less digits than its factorization.

40454816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264223 (or 1264215 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 40454816 is about 6360.4100496745. The cubic root of 40454816 is about 343.2865147038.

The spelling of 40454816 in words is "forty million, four hundred fifty-four thousand, eight hundred sixteen".