1020428860 has 48 divisors (see below), whose sum is σ = 2413135872. Its totient is φ = 359092800.

The previous prime is 1020428831. The next prime is 1020428863. The reversal of 1020428860 is 688240201.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020428863) 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, 67992 + ... + 81631.

It is an arithmetic number, because the mean of its divisors is an integer number (50273664).

Almost surely, 2^1020428860 is an apocalyptic number.

1020428860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020428860 is an abundant number, since it is smaller than the sum of its proper divisors (1392707012).

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

1020428860 is a wasteful number, since it uses less digits than its factorization.

1020428860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149674 (or 149672 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 1020428860 is about 31944.1522034941. The cubic root of 1020428860 is about 1006.7637682942.

The spelling of 1020428860 in words is "one billion, twenty million, four hundred twenty-eight thousand, eight hundred sixty".