897940890 has 192 divisors, whose sum is σ = 3019161600. Its totient is φ = 186546240.

The previous prime is 897940873. The next prime is 897940903. The reversal of 897940890 is 98049798.

897940890 is a `hidden beast` number, since 89 + 79 + 408 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 95 ways as a sum of consecutive naturals, for example, 184711 + ... + 189509.

It is an arithmetic number, because the mean of its divisors is an integer number (15724800).

Almost surely, 2^897940890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897940890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1509580800).

897940890 is an abundant number, since it is smaller than the sum of its proper divisors (2121220710).

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

897940890 is a wasteful number, since it uses less digits than its factorization.

897940890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839 (or 4827 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 897940890 is about 29965.6618481888. The cubic root of 897940890 is about 964.7525079652.

The spelling of 897940890 in words is "eight hundred ninety-seven million, nine hundred forty thousand, eight hundred ninety".