90729156 has 48 divisors (see below), whose sum is σ = 243138560. Its totient is φ = 25794720.

The previous prime is 90729151. The next prime is 90729167. The reversal of 90729156 is 65192709.

It is not an unprimeable number, because it can be changed into a prime (90729151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15165 + ... + 20283.

Almost surely, 2^90729156 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 90729156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121569280).

90729156 is an abundant number, since it is smaller than the sum of its proper divisors (152409404).

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

90729156 is a wasteful number, since it uses less digits than its factorization.

90729156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5344 (or 5342 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 90729156 is about 9525.1853525273. The cubic root of 90729156 is about 449.3474591522.

The spelling of 90729156 in words is "ninety million, seven hundred twenty-nine thousand, one hundred fifty-six".