1029194820 has 72 divisors (see below), whose sum is σ = 3174837120. Its totient is φ = 269797440.

The previous prime is 1029194797. The next prime is 1029194893. The reversal of 1029194820 is 284919201.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 37836 + ... + 59075.

It is an arithmetic number, because the mean of its divisors is an integer number (44094960).

Almost surely, 2^1029194820 is an apocalyptic number.

1029194820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1029194820 is an abundant number, since it is smaller than the sum of its proper divisors (2145642300).

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

1029194820 is a wasteful number, since it uses less digits than its factorization.

1029194820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96985 (or 96980 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1029194820 is about 32081.0663787849. The cubic root of 1029194820 is about 1009.6384092675.

It can be divided in two parts, 10291 and 94820, that added together give a triangular number (105111 = T₄₅₈).

The spelling of 1029194820 in words is "one billion, twenty-nine million, one hundred ninety-four thousand, eight hundred twenty".