90810542 has 16 divisors (see below), whose sum is σ = 141285600. Its totient is φ = 43723680.

The previous prime is 90810541. The next prime is 90810547. The reversal of 90810542 is 24501809.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90810541) 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, 22559 + ... + 26277.

It is an arithmetic number, because the mean of its divisors is an integer number (8830350).

Almost surely, 2^90810542 is an apocalyptic number.

90810542 is a deficient number, since it is larger than the sum of its proper divisors (50475058).

90810542 is a wasteful number, since it uses less digits than its factorization.

90810542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 90810542 is about 9529.4565427416. The cubic root of 90810542 is about 449.4817771028.

The spelling of 90810542 in words is "ninety million, eight hundred ten thousand, five hundred forty-two".