40129340 has 24 divisors (see below), whose sum is σ = 84460320. Its totient is φ = 16015808.

The previous prime is 40129337. The next prime is 40129343. The reversal of 40129340 is 4392104.

It is an interprime number because it is at equal distance from previous prime (40129337) and next prime (40129343).

It is a super-2 number, since 2×40129340² = 3220727857671200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40129343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8066 + ... + 12054.

It is an arithmetic number, because the mean of its divisors is an integer number (3519180).

Almost surely, 2^40129340 is an apocalyptic number.

It is an amenable number.

40129340 is an abundant number, since it is smaller than the sum of its proper divisors (44330980).

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

40129340 is a wasteful number, since it uses less digits than its factorization.

40129340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501 (or 4499 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40129340 is about 6334.7722926716. The cubic root of 40129340 is about 342.3634065582.

The spelling of 40129340 in words is "forty million, one hundred twenty-nine thousand, three hundred forty".