90197394 has 32 divisors (see below), whose sum is σ = 206447616. Its totient is φ = 25735440.

The previous prime is 90197369. The next prime is 90197399. The reversal of 90197394 is 49379109.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (90197399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56629 + ... + 58199.

It is an arithmetic number, because the mean of its divisors is an integer number (6451488).

Almost surely, 2^90197394 is an apocalyptic number.

90197394 is an abundant number, since it is smaller than the sum of its proper divisors (116250222).

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

90197394 is a wasteful number, since it uses less digits than its factorization.

90197394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950.

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

The square root of 90197394 is about 9497.2308595716. The cubic root of 90197394 is about 448.4678659418.

The spelling of 90197394 in words is "ninety million, one hundred ninety-seven thousand, three hundred ninety-four".