253749735 has 48 divisors (see below), whose sum is σ = 467419680. Its totient is φ = 126904320.

The previous prime is 253749689. The next prime is 253749767. The reversal of 253749735 is 537947352.

253749735 is a `hidden beast` number, since 2 + 537 + 49 + 73 + 5 = 666.

It is not a de Polignac number, because 253749735 - 2⁸ = 253749479 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 312480 + ... + 313290.

It is an arithmetic number, because the mean of its divisors is an integer number (9737910).

Almost surely, 2^253749735 is an apocalyptic number.

253749735 is a deficient number, since it is larger than the sum of its proper divisors (213669945).

253749735 is a wasteful number, since it uses less digits than its factorization.

253749735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248 (or 1245 counting only the distinct ones).

The product of its digits is 793800, while the sum is 45.

The square root of 253749735 is about 15929.5240041879. The cubic root of 253749735 is about 633.0944881150.

The spelling of 253749735 in words is "two hundred fifty-three million, seven hundred forty-nine thousand, seven hundred thirty-five".