891740540 has 12 divisors (see below), whose sum is σ = 1872655176. Its totient is φ = 356696208.

The previous prime is 891740539. The next prime is 891740569. The reversal of 891740540 is 45047198.

It is a junction number, because it is equal to n+sod(n) for n = 891740494 and 891740503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22293494 + ... + 22293533.

It is an arithmetic number, because the mean of its divisors is an integer number (156054598).

Almost surely, 2^891740540 is an apocalyptic number.

It is an amenable number.

891740540 is an abundant number, since it is smaller than the sum of its proper divisors (980914636).

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

891740540 is a wasteful number, since it uses less digits than its factorization.

891740540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44587036 (or 44587034 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 891740540 is about 29862.0250485462. The cubic root of 891740540 is about 962.5268141178.

The spelling of 891740540 in words is "eight hundred ninety-one million, seven hundred forty thousand, five hundred forty".