28723716 has 36 divisors (see below), whose sum is σ = 82980352. Its totient is φ = 8206704.

The previous prime is 28723703. The next prime is 28723733. The reversal of 28723716 is 61732782.

28723716 is a `hidden beast` number, since 287 + 2 + 371 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56740 + ... + 57243.

Almost surely, 2^28723716 is an apocalyptic number.

It is an amenable number.

28723716 is an abundant number, since it is smaller than the sum of its proper divisors (54256636).

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

28723716 is a wasteful number, since it uses less digits than its factorization.

28723716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114000 (or 113995 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 28723716 is about 5359.4510912966. The cubic root of 28723716 is about 306.2528987092.

The spelling of 28723716 in words is "twenty-eight million, seven hundred twenty-three thousand, seven hundred sixteen".