40633813 has 4 divisors (see below), whose sum is σ = 44327808. Its totient is φ = 36939820.

The previous prime is 40633793. The next prime is 40633841. The reversal of 40633813 is 31833604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40633813 - 2⁹ = 40633301 is a prime.

It is a super-2 number, since 2×40633813² = 3302213517837938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40630813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1846981 + ... + 1847002.

It is an arithmetic number, because the mean of its divisors is an integer number (11081952).

Almost surely, 2^40633813 is an apocalyptic number.

It is an amenable number.

40633813 is a deficient number, since it is larger than the sum of its proper divisors (3693995).

40633813 is a wasteful number, since it uses less digits than its factorization.

40633813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3693994.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 40633813 is about 6374.4657031001. The cubic root of 40633813 is about 343.7920733957.

It can be divided in two parts, 406338 and 13, that added together give a triangular number (406351 = T₉₀₁).

The spelling of 40633813 in words is "forty million, six hundred thirty-three thousand, eight hundred thirteen".