90738780 has 48 divisors (see below), whose sum is σ = 277167744. Its totient is φ = 21997120.

The previous prime is 90738773. The next prime is 90738787. The reversal of 90738780 is 8783709.

It is an interprime number because it is at equal distance from previous prime (90738773) and next prime (90738787).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90738787) 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, 68082 + ... + 69401.

It is an arithmetic number, because the mean of its divisors is an integer number (5774328).

Almost surely, 2^90738780 is an apocalyptic number.

It is an amenable number.

90738780 is an abundant number, since it is smaller than the sum of its proper divisors (186428964).

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

90738780 is a wasteful number, since it uses less digits than its factorization.

90738780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137506 (or 137504 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 90738780 is about 9525.6905261508. The cubic root of 90738780 is about 449.3633466105.

The spelling of 90738780 in words is "ninety million, seven hundred thirty-eight thousand, seven hundred eighty".