90749436 has 48 divisors (see below), whose sum is σ = 217709184. Its totient is φ = 29405376.

The previous prime is 90749413. The next prime is 90749437. The reversal of 90749436 is 63494709.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90749437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204631 + ... + 205073.

It is an arithmetic number, because the mean of its divisors is an integer number (4535608).

Almost surely, 2^90749436 is an apocalyptic number.

It is an amenable number.

90749436 is an abundant number, since it is smaller than the sum of its proper divisors (126959748).

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

90749436 is a wasteful number, since it uses less digits than its factorization.

90749436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 90749436 is about 9526.2498392599. The cubic root of 90749436 is about 449.3809364010.

The spelling of 90749436 in words is "ninety million, seven hundred forty-nine thousand, four hundred thirty-six".