90494420 has 24 divisors (see below), whose sum is σ = 198301824. Its totient is φ = 34623776.

The previous prime is 90494387. The next prime is 90494423. The reversal of 90494420 is 2449409.

It is a super-2 number, since 2×90494420² = 16378480102272800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90494423) 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, 97904 + ... + 98823.

It is an arithmetic number, because the mean of its divisors is an integer number (8262576).

Almost surely, 2^90494420 is an apocalyptic number.

It is an amenable number.

90494420 is an abundant number, since it is smaller than the sum of its proper divisors (107807404).

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

90494420 is a wasteful number, since it uses less digits than its factorization.

90494420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196759 (or 196757 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 90494420 is about 9512.8555124106. The cubic root of 90494420 is about 448.9596047011.

The spelling of 90494420 in words is "ninety million, four hundred ninety-four thousand, four hundred twenty".