40367640 has 32 divisors (see below), whose sum is σ = 121103280. Its totient is φ = 10764672.

The previous prime is 40367633. The next prime is 40367651. The reversal of 40367640 is 4676304.

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

It is a junction number, because it is equal to n+sod(n) for n = 40367598 and 40367607.

It is a congruent number.

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, 168079 + ... + 168318.

Almost surely, 2^40367640 is an apocalyptic number.

40367640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40367640 is an abundant number, since it is smaller than the sum of its proper divisors (80735640).

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

40367640 is a wasteful number, since it uses less digits than its factorization.

40367640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336411 (or 336407 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 40367640 is about 6353.5533365197. The cubic root of 40367640 is about 343.0397549027.

The spelling of 40367640 in words is "forty million, three hundred sixty-seven thousand, six hundred forty".