28077490 has 24 divisors (see below), whose sum is σ = 58791852. Its totient is φ = 9626400.

The previous prime is 28077473. The next prime is 28077493. The reversal of 28077490 is 9477082.

28077490 = T₃₅₁ + T₃₅₂ + ... + T₅₉₅.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26327161 + 1750329 = 5131^2 + 1323^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28077493) 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, 28161 + ... + 29140.

Almost surely, 2^28077490 is an apocalyptic number.

28077490 is an abundant number, since it is smaller than the sum of its proper divisors (30714362).

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

28077490 is a wasteful number, since it uses less digits than its factorization.

28077490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57322 (or 57315 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 28077490 is about 5298.8196798910. The cubic root of 28077490 is about 303.9387645012.

The spelling of 28077490 in words is "twenty-eight million, seventy-seven thousand, four hundred ninety".