28723412 has 12 divisors (see below), whose sum is σ = 52451616. Its totient is φ = 13737240.

The previous prime is 28723367. The next prime is 28723423. The reversal of 28723412 is 21432782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156014 + ... + 156197.

It is an arithmetic number, because the mean of its divisors is an integer number (4370968).

Almost surely, 2^28723412 is an apocalyptic number.

It is an amenable number.

28723412 is a deficient number, since it is larger than the sum of its proper divisors (23728204).

28723412 is a wasteful number, since it uses less digits than its factorization.

28723412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312238 (or 312236 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 28723412 is about 5359.4227301082. The cubic root of 28723412 is about 306.2518182871.

The spelling of 28723412 in words is "twenty-eight million, seven hundred twenty-three thousand, four hundred twelve".