90249490 has 16 divisors (see below), whose sum is σ = 162590400. Its totient is φ = 36068400.

The previous prime is 90249457. The next prime is 90249491. The reversal of 90249490 is 9494209.

It is not an unprimeable number, because it can be changed into a prime (90249491) 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, 10765 + ... + 17215.

It is an arithmetic number, because the mean of its divisors is an integer number (10161900).

Almost surely, 2^90249490 is an apocalyptic number.

90249490 is a deficient number, since it is larger than the sum of its proper divisors (72340910).

90249490 is a wasteful number, since it uses less digits than its factorization.

90249490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 90249490 is about 9499.9731578568. The cubic root of 90249490 is about 448.5541909980.

The spelling of 90249490 in words is "ninety million, two hundred forty-nine thousand, four hundred ninety".