891156054 has 8 divisors (see below), whose sum is σ = 1782312120. Its totient is φ = 297052016.

The previous prime is 891156053. The next prime is 891156061. The reversal of 891156054 is 450651198.

It is a sphenic number, since it is the product of 3 distinct primes.

891156054 is an admirable number.

It is a super-2 number, since 2×891156054² = 1588318225161701832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891156053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74262999 + ... + 74263010.

It is an arithmetic number, because the mean of its divisors is an integer number (222789015).

Almost surely, 2^891156054 is an apocalyptic number.

891156054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

891156054 is a wasteful number, since it uses less digits than its factorization.

891156054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148526014.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 891156054 is about 29852.2370016051. The cubic root of 891156054 is about 962.3164740091.

The spelling of 891156054 in words is "eight hundred ninety-one million, one hundred fifty-six thousand, fifty-four".