28181950 has 24 divisors (see below), whose sum is σ = 52909560. Its totient is φ = 11167200.

The previous prime is 28181947. The next prime is 28181953. The reversal of 28181950 is 5918182.

It is an interprime number because it is at equal distance from previous prime (28181947) and next prime (28181953).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28181953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2865 + ... + 8035.

It is an arithmetic number, because the mean of its divisors is an integer number (2204565).

Almost surely, 2^28181950 is an apocalyptic number.

28181950 is a deficient number, since it is larger than the sum of its proper divisors (24727610).

28181950 is a wasteful number, since it uses less digits than its factorization.

28181950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292 (or 5287 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 28181950 is about 5308.6674410816. The cubic root of 28181950 is about 304.3152244434.

The spelling of 28181950 in words is "twenty-eight million, one hundred eighty-one thousand, nine hundred fifty".