891129434 has 16 divisors (see below), whose sum is σ = 1502105472. Its totient is φ = 393408048.

The previous prime is 891129403. The next prime is 891129521. The reversal of 891129434 is 434921198.

It is a super-2 number, since 2×891129434² = 1588223336282320712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 891129391 and 891129400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744494 + ... + 745689.

It is an arithmetic number, because the mean of its divisors is an integer number (93881592).

Almost surely, 2^891129434 is an apocalyptic number.

891129434 is a deficient number, since it is larger than the sum of its proper divisors (610976038).

891129434 is a wasteful number, since it uses less digits than its factorization.

891129434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490221.

The product of its digits is 62208, while the sum is 41.

The square root of 891129434 is about 29851.7911355416. The cubic root of 891129434 is about 962.3068920287.

The spelling of 891129434 in words is "eight hundred ninety-one million, one hundred twenty-nine thousand, four hundred thirty-four".