1020406860 has 72 divisors (see below), whose sum is σ = 3376625616. Its totient is φ = 247370880.

The previous prime is 1020406853. The next prime is 1020406873. The reversal of 1020406860 is 686040201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255699 + ... + 259658.

It is an arithmetic number, because the mean of its divisors is an integer number (46897578).

Almost surely, 2^1020406860 is an apocalyptic number.

1020406860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020406860 is an abundant number, since it is smaller than the sum of its proper divisors (2356218756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020406860 is a wasteful number, since it uses less digits than its factorization.

1020406860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515383 (or 515378 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1020406860 is about 31943.8078506618. The cubic root of 1020406860 is about 1006.7565331134.

It can be divided in two parts, 102040 and 6860, that added together give a square (108900 = 330²).

The spelling of 1020406860 in words is "one billion, twenty million, four hundred six thousand, eight hundred sixty".