253870785 has 48 divisors (see below), whose sum is σ = 520266240. Its totient is φ = 112049280.

The previous prime is 253870783. The next prime is 253870807. The reversal of 253870785 is 587078352.

It is not a de Polignac number, because 253870785 - 2¹ = 253870783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 253870785.

It is not an unprimeable number, because it can be changed into a prime (253870783) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4761 + ... + 23030.

It is an arithmetic number, because the mean of its divisors is an integer number (10838880).

Almost surely, 2^253870785 is an apocalyptic number.

It is an amenable number.

253870785 is an abundant number, since it is smaller than the sum of its proper divisors (266395455).

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

253870785 is a wasteful number, since it uses less digits than its factorization.

253870785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27838 (or 27835 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The square root of 253870785 is about 15933.3230997178. The cubic root of 253870785 is about 633.1951435957.

The spelling of 253870785 in words is "two hundred fifty-three million, eight hundred seventy thousand, seven hundred eighty-five".