897400401786 has 160 divisors (see below), whose sum is σ = 2468429040000. Its totient is φ = 242905086144.

The previous prime is 897400401773. The next prime is 897400401811. The reversal of 897400401786 is 687104004798.

It is a happy number.

It is a super-2 number, since 2×897400401786² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 630750 + ... + 1480758.

It is an arithmetic number, because the mean of its divisors is an integer number (15427681500).

Almost surely, 2^897400401786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897400401786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234214520000).

897400401786 is an abundant number, since it is smaller than the sum of its proper divisors (1571028638214).

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

897400401786 is a wasteful number, since it uses less digits than its factorization.

897400401786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850063 (or 850040 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 897400401786 in words is "eight hundred ninety-seven billion, four hundred million, four hundred one thousand, seven hundred eighty-six".