40729392 has 100 divisors (see below), whose sum is σ = 128644296. Its totient is φ = 12337920.

The previous prime is 40729391. The next prime is 40729397. The reversal of 40729392 is 29392704.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (40729391) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12828 + ... + 15684.

Almost surely, 2^40729392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40729392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64322148).

40729392 is an abundant number, since it is smaller than the sum of its proper divisors (87914904).

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

40729392 is a wasteful number, since it uses less digits than its factorization.

40729392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888 (or 2873 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 40729392 is about 6381.9583201397. The cubic root of 40729392 is about 344.0614186351.

The spelling of 40729392 in words is "forty million, seven hundred twenty-nine thousand, three hundred ninety-two".