1020250440 has 96 divisors (see below), whose sum is σ = 3617265600. Its totient is φ = 247332480.

The previous prime is 1020250433. The next prime is 1020250459. The reversal of 1020250440 is 440520201.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 124860 + ... + 132779.

It is an arithmetic number, because the mean of its divisors is an integer number (37679850).

Almost surely, 2^1020250440 is an apocalyptic number.

1020250440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020250440 is an abundant number, since it is smaller than the sum of its proper divisors (2597015160).

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

1020250440 is a wasteful number, since it uses less digits than its factorization.

1020250440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257667 (or 257660 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1020250440 is about 31941.3593949913. The cubic root of 1020250440 is about 1006.7050879790.

Adding to 1020250440 its reverse (440520201), we get a palindrome (1460770641).

The spelling of 1020250440 in words is "one billion, twenty million, two hundred fifty thousand, four hundred forty".