40649520 has 40 divisors (see below), whose sum is σ = 126014256. Its totient is φ = 10839808.

The previous prime is 40649519. The next prime is 40649537. The reversal of 40649520 is 2594604.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84447 + ... + 84926.

Almost surely, 2^40649520 is an apocalyptic number.

40649520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40649520 is an abundant number, since it is smaller than the sum of its proper divisors (85364736).

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

40649520 is a wasteful number, since it uses less digits than its factorization.

40649520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169389 (or 169383 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 40649520 is about 6375.6976088896. The cubic root of 40649520 is about 343.8363652966.

The spelling of 40649520 in words is "forty million, six hundred forty-nine thousand, five hundred twenty".