253684078 has 4 divisors (see below), whose sum is σ = 380526120. Its totient is φ = 126842038.

The previous prime is 253684069. The next prime is 253684153. The reversal of 253684078 is 870486352.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×253684078² = 128711222861420168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63421018 + ... + 63421021.

It is an arithmetic number, because the mean of its divisors is an integer number (95131530).

Almost surely, 2^253684078 is an apocalyptic number.

253684078 is a deficient number, since it is larger than the sum of its proper divisors (126842042).

253684078 is a wasteful number, since it uses less digits than its factorization.

253684078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126842041.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 253684078 is about 15927.4630120431. The cubic root of 253684078 is about 633.0398796238.

The spelling of 253684078 in words is "two hundred fifty-three million, six hundred eighty-four thousand, seventy-eight".