90402373 has 12 divisors (see below), whose sum is σ = 93151908. Its totient is φ = 87718400.

The previous prime is 90402349. The next prime is 90402391. The reversal of 90402373 is 37320409.

It can be written as a sum of positive squares in 6 ways, for example, as 11512449 + 78889924 = 3393^2 + 8882^2 .

It is not a de Polignac number, because 90402373 - 2¹³ = 90394181 is a prime.

It is a super-2 number, since 2×90402373² = 16345178088062258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90402973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 799965 + ... + 800077.

It is an arithmetic number, because the mean of its divisors is an integer number (7762659).

Almost surely, 2^90402373 is an apocalyptic number.

It is an amenable number.

90402373 is a deficient number, since it is larger than the sum of its proper divisors (2749535).

90402373 is a wasteful number, since it uses less digits than its factorization.

90402373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 90402373 is about 9508.0162494602. The cubic root of 90402373 is about 448.8073323138.

The spelling of 90402373 in words is "ninety million, four hundred two thousand, three hundred seventy-three".