40646436 has 12 divisors (see below), whose sum is σ = 94841712. Its totient is φ = 13548808.

The previous prime is 40646401. The next prime is 40646443. The reversal of 40646436 is 63464604.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 40646397 and 40646406.

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, 1693590 + ... + 1693613.

It is an arithmetic number, because the mean of its divisors is an integer number (7903476).

Almost surely, 2^40646436 is an apocalyptic number.

It is an amenable number.

40646436 is an abundant number, since it is smaller than the sum of its proper divisors (54195276).

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

40646436 is a wasteful number, since it uses less digits than its factorization.

40646436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387210 (or 3387208 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 40646436 is about 6375.4557484152. The cubic root of 40646436 is about 343.8276696780.

The spelling of 40646436 in words is "forty million, six hundred forty-six thousand, four hundred thirty-six".