891267420 has 24 divisors (see below), whose sum is σ = 2495548944. Its totient is φ = 237671296.

The previous prime is 891267413. The next prime is 891267431. The reversal of 891267420 is 24762198.

It is a super-2 number, since 2×891267420² = 1588715227906912800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7427169 + ... + 7427288.

It is an arithmetic number, because the mean of its divisors is an integer number (103981206).

Almost surely, 2^891267420 is an apocalyptic number.

It is an amenable number.

891267420 is an abundant number, since it is smaller than the sum of its proper divisors (1604281524).

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

891267420 is a wasteful number, since it uses less digits than its factorization.

891267420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14854469 (or 14854467 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 891267420 is about 29854.1022306818. The cubic root of 891267420 is about 962.3565585981.

The spelling of 891267420 in words is "eight hundred ninety-one million, two hundred sixty-seven thousand, four hundred twenty".