28780262 has 32 divisors (see below), whose sum is σ = 50872320. Its totient is φ = 11956320.

The previous prime is 28780261. The next prime is 28780289. The reversal of 28780262 is 26208782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28780261) 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, 125564 + ... + 125792.

It is an arithmetic number, because the mean of its divisors is an integer number (1589760).

Almost surely, 2^28780262 is an apocalyptic number.

28780262 is a deficient number, since it is larger than the sum of its proper divisors (22092058).

28780262 is a wasteful number, since it uses less digits than its factorization.

28780262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28780262 is about 5364.7238512341. The cubic root of 28780262 is about 306.4537318821.

Multiplying 28780262 by its sum of digits (35), we get a triangular number (1007309170 = T₄₄₈₈₄).

The spelling of 28780262 in words is "twenty-eight million, seven hundred eighty thousand, two hundred sixty-two".