90561944 has 16 divisors (see below), whose sum is σ = 185240520. Its totient is φ = 41164480.

The previous prime is 90561901. The next prime is 90561949. The reversal of 90561944 is 44916509.

It is a junction number, because it is equal to n+sod(n) for n = 90561898 and 90561907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90561949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514469 + ... + 514644.

Almost surely, 2^90561944 is an apocalyptic number.

It is an amenable number.

90561944 is an abundant number, since it is smaller than the sum of its proper divisors (94678576).

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

90561944 is a wasteful number, since it uses less digits than its factorization.

90561944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029130 (or 1029126 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 90561944 is about 9516.4039426666. The cubic root of 90561944 is about 449.0712433020.

The spelling of 90561944 in words is "ninety million, five hundred sixty-one thousand, nine hundred forty-four".