90729042 has 8 divisors (see below), whose sum is σ = 181458096. Its totient is φ = 30243012.

The previous prime is 90729019. The next prime is 90729071. The reversal of 90729042 is 24092709.

It is a sphenic number, since it is the product of 3 distinct primes.

90729042 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 90728994 and 90729012.

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, 7560748 + ... + 7560759.

It is an arithmetic number, because the mean of its divisors is an integer number (22682262).

Almost surely, 2^90729042 is an apocalyptic number.

90729042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90729042 is a wasteful number, since it uses less digits than its factorization.

90729042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15121512.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 90729042 is about 9525.1793683899. The cubic root of 90729042 is about 449.3472709524.

The spelling of 90729042 in words is "ninety million, seven hundred twenty-nine thousand, forty-two".