28372716 has 36 divisors (see below), whose sum is σ = 71881992. Its totient is φ = 9436224.

The previous prime is 28372709. The next prime is 28372723. The reversal of 28372716 is 61727382.

It is an interprime number because it is at equal distance from previous prime (28372709) and next prime (28372723).

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

It is a super-2 number, since 2×28372716² = 1610022026433312, which contains 22 as substring.

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

It is a congruent number.

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, 29296 + ... + 30248.

It is an arithmetic number, because the mean of its divisors is an integer number (1996722).

Almost surely, 2^28372716 is an apocalyptic number.

It is an amenable number.

28372716 is an abundant number, since it is smaller than the sum of its proper divisors (43509276).

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

28372716 is a wasteful number, since it uses less digits than its factorization.

28372716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790 (or 1785 counting only the distinct ones).

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

The square root of 28372716 is about 5326.6045469886. The cubic root of 28372716 is about 305.0003260769. Note that the first 3 decimals are identical.

The spelling of 28372716 in words is "twenty-eight million, three hundred seventy-two thousand, seven hundred sixteen".