40129412 has 6 divisors (see below), whose sum is σ = 70226478. Its totient is φ = 20064704.

The previous prime is 40129391. The next prime is 40129433. The reversal of 40129412 is 21492104.

It is an interprime number because it is at equal distance from previous prime (40129391) and next prime (40129433).

It can be written as a sum of positive squares in only one way, i.e., 25260676 + 14868736 = 5026^2 + 3856^2 .

It is a super-2 number, since 2×40129412² = 3220739414931488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5016173 + ... + 5016180.

It is an arithmetic number, because the mean of its divisors is an integer number (11704413).

Almost surely, 2^40129412 is an apocalyptic number.

It is an amenable number.

40129412 is a deficient number, since it is larger than the sum of its proper divisors (30097066).

40129412 is a wasteful number, since it uses less digits than its factorization.

40129412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10032357 (or 10032355 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 40129412 is about 6334.7779755884. Note that the first 3 decimals coincide. The cubic root of 40129412 is about 342.3636113140.

The spelling of 40129412 in words is "forty million, one hundred twenty-nine thousand, four hundred twelve".