1002860391 has 8 divisors (see below), whose sum is σ = 1440004720. Its totient is φ = 617144832.

The previous prime is 1002860377. The next prime is 1002860393. The reversal of 1002860391 is 1930682001.

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

It is not a de Polignac number, because 1002860391 - 2⁵ = 1002860359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002860393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12857146 + ... + 12857223.

It is an arithmetic number, because the mean of its divisors is an integer number (180000590).

Almost surely, 2^1002860391 is an apocalyptic number.

1002860391 is a deficient number, since it is larger than the sum of its proper divisors (437144329).

1002860391 is a wasteful number, since it uses less digits than its factorization.

1002860391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25714385.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1002860391 is about 31667.9710591001. The cubic root of 1002860391 is about 1000.9525560156.

The spelling of 1002860391 in words is "one billion, two million, eight hundred sixty thousand, three hundred ninety-one".