90037990 has 48 divisors (see below), whose sum is σ = 192141072. Its totient is φ = 30278976.

The previous prime is 90037963. The next prime is 90037993. The reversal of 90037990 is 9973009.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90037993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24237 + ... + 27703.

It is an arithmetic number, because the mean of its divisors is an integer number (4002939).

Almost surely, 2^90037990 is an apocalyptic number.

90037990 is an abundant number, since it is smaller than the sum of its proper divisors (102103082).

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

90037990 is a wasteful number, since it uses less digits than its factorization.

90037990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541 (or 3534 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 90037990 is about 9488.8350180620. The cubic root of 90037990 is about 448.2035208103.

The spelling of 90037990 in words is "ninety million, thirty-seven thousand, nine hundred ninety".