90149730 has 32 divisors (see below), whose sum is σ = 236029248. Its totient is φ = 21854400.

The previous prime is 90149729. The next prime is 90149749. The reversal of 90149730 is 3794109.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 90149691 and 90149700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136261 + ... + 136920.

It is an arithmetic number, because the mean of its divisors is an integer number (7375914).

Almost surely, 2^90149730 is an apocalyptic number.

90149730 is an abundant number, since it is smaller than the sum of its proper divisors (145879518).

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

90149730 is a wasteful number, since it uses less digits than its factorization.

90149730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273202.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 90149730 is about 9494.7211649421. The cubic root of 90149730 is about 448.3888557554.

The spelling of 90149730 in words is "ninety million, one hundred forty-nine thousand, seven hundred thirty".