1020400850 has 24 divisors (see below), whose sum is σ = 2169081408. Its totient is φ = 349851600.

The previous prime is 1020400841. The next prime is 1020400939. The reversal of 1020400850 is 580040201.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1457366 + ... + 1458065.

It is an arithmetic number, because the mean of its divisors is an integer number (90378392).

Almost surely, 2^1020400850 is an apocalyptic number.

1020400850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020400850 is an abundant number, since it is smaller than the sum of its proper divisors (1148680558).

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

1020400850 is a wasteful number, since it uses less digits than its factorization.

1020400850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915450 (or 2915445 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1020400850 is about 31943.7137790834. The cubic root of 1020400850 is about 1006.7545565754.

The spelling of 1020400850 in words is "one billion, twenty million, four hundred thousand, eight hundred fifty".