1078723257 has 16 divisors (see below), whose sum is σ = 1473571008. Its totient is φ = 701663040.

The previous prime is 1078723231. The next prime is 1078723259. The reversal of 1078723257 is 7523278701.

It is not a de Polignac number, because 1078723257 - 2⁶ = 1078723193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1078723259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10038 + ... + 47520.

It is an arithmetic number, because the mean of its divisors is an integer number (92098188).

Almost surely, 2^1078723257 is an apocalyptic number.

It is an amenable number.

1078723257 is a deficient number, since it is larger than the sum of its proper divisors (394847751).

1078723257 is a wasteful number, since it uses less digits than its factorization.

1078723257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37720.

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 1078723257 is about 32843.9226798505. The cubic root of 1078723257 is about 1025.5811123228.

The spelling of 1078723257 in words is "one billion, seventy-eight million, seven hundred twenty-three thousand, two hundred fifty-seven".