90193794 has 16 divisors (see below), whose sum is σ = 182043840. Its totient is φ = 29788560.

The previous prime is 90193793. The next prime is 90193811. The reversal of 90193794 is 49739109.

It is a super-2 number, since 2×90193794² = 16269840952228872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90193793) 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, 68302 + ... + 69609.

It is an arithmetic number, because the mean of its divisors is an integer number (11377740).

Almost surely, 2^90193794 is an apocalyptic number.

90193794 is an abundant number, since it is smaller than the sum of its proper divisors (91850046).

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

90193794 is a wasteful number, since it uses less digits than its factorization.

90193794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138025.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 90193794 is about 9497.0413287508. The cubic root of 90193794 is about 448.4618993770.

The spelling of 90193794 in words is "ninety million, one hundred ninety-three thousand, seven hundred ninety-four".