1253893978 has 8 divisors (see below), whose sum is σ = 1881003168. Its totient is φ = 626892924.

The previous prime is 1253893969. The next prime is 1253894011. The reversal of 1253893978 is 8793983521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15075 + ... + 52297.

It is an arithmetic number, because the mean of its divisors is an integer number (235125396).

Almost surely, 2^1253893978 is an apocalyptic number.

1253893978 is a deficient number, since it is larger than the sum of its proper divisors (627109190).

1253893978 is a wasteful number, since it uses less digits than its factorization.

1253893978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54068.

The product of its digits is 3265920, while the sum is 55.

The square root of 1253893978 is about 35410.3654033674. The cubic root of 1253893978 is about 1078.3347616704.

The spelling of 1253893978 in words is "one billion, two hundred fifty-three million, eight hundred ninety-three thousand, nine hundred seventy-eight".