1020625770 has 128 divisors (see below), whose sum is σ = 2690184960. Its totient is φ = 246804480.

The previous prime is 1020625729. The next prime is 1020625789. The reversal of 1020625770 is 775260201.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1648521 + ... + 1649139.

It is an arithmetic number, because the mean of its divisors is an integer number (21017070).

Almost surely, 2^1020625770 is an apocalyptic number.

1020625770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020625770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345092480).

1020625770 is an abundant number, since it is smaller than the sum of its proper divisors (1669559190).

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

1020625770 is a wasteful number, since it uses less digits than its factorization.

1020625770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 1020625770 is about 31947.2341525835. The cubic root of 1020625770 is about 1006.8285218213.

Adding to 1020625770 its reverse (775260201), we get a palindrome (1795885971).

The spelling of 1020625770 in words is "one billion, twenty million, six hundred twenty-five thousand, seven hundred seventy".