28077770 has 32 divisors (see below), whose sum is σ = 58064256. Its totient is φ = 9576000.

The previous prime is 28077767. The next prime is 28077773. The reversal of 28077770 is 7777082.

It is an interprime number because it is at equal distance from previous prime (28077767) and next prime (28077773).

It is a super-2 number, since 2×28077770² = 1576722336345800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28077773) 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, 13820 + ... + 15720.

It is an arithmetic number, because the mean of its divisors is an integer number (1814508).

Almost surely, 2^28077770 is an apocalyptic number.

28077770 is an abundant number, since it is smaller than the sum of its proper divisors (29986486).

28077770 is a wasteful number, since it uses less digits than its factorization.

28077770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126.

The product of its (nonzero) digits is 38416, while the sum is 38.

The square root of 28077770 is about 5298.8461008035. The cubic root of 28077770 is about 303.9397748309.

The spelling of 28077770 in words is "twenty-eight million, seventy-seven thousand, seven hundred seventy".