28373490 has 80 divisors (see below), whose sum is σ = 79662528. Its totient is φ = 7232544.

The previous prime is 28373489. The next prime is 28373491. The reversal of 28373490 is 9437382.

It is an interprime number because it is at equal distance from previous prime (28373489) and next prime (28373491).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28373491) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17869 + ... + 19391.

Almost surely, 2^28373490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28373490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39831264).

28373490 is an abundant number, since it is smaller than the sum of its proper divisors (51289038).

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

28373490 is a wasteful number, since it uses less digits than its factorization.

28373490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1556 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 28373490 is about 5326.6772006571. The cubic root of 28373490 is about 305.0030994937.

The spelling of 28373490 in words is "twenty-eight million, three hundred seventy-three thousand, four hundred ninety".