40939420 has 12 divisors (see below), whose sum is σ = 85972824. Its totient is φ = 16375760.

The previous prime is 40939411. The next prime is 40939453. The reversal of 40939420 is 2493904.

It is a super-2 number, since 2×40939420² = 3352072219872800, which contains 22 as substring.

It is a congruent number.

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, 1023466 + ... + 1023505.

It is an arithmetic number, because the mean of its divisors is an integer number (7164402).

Almost surely, 2^40939420 is an apocalyptic number.

It is an amenable number.

40939420 is an abundant number, since it is smaller than the sum of its proper divisors (45033404).

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

40939420 is a wasteful number, since it uses less digits than its factorization.

40939420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046980 (or 2046978 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 40939420 is about 6398.3919854914. The cubic root of 40939420 is about 344.6518086163.

The spelling of 40939420 in words is "forty million, nine hundred thirty-nine thousand, four hundred twenty".