1422897840 has 800 divisors, whose sum is σ = 6452920320. Its totient is φ = 282175488.

The previous prime is 1422897811. The next prime is 1422897887. The reversal of 1422897840 is 487982241.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 11203857 + ... + 11203983.

Almost surely, 2^1422897840 is an apocalyptic number.

1422897840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1422897840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3226460160).

1422897840 is an abundant number, since it is smaller than the sum of its proper divisors (5030022480).

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

1422897840 is a wasteful number, since it uses less digits than its factorization.

1422897840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1422897840 is about 37721.3181105857. The cubic root of 1422897840 is about 1124.7549332859.

It can be divided in two parts, 142 and 2897840, that added together give a palindrome (2897982).

The spelling of 1422897840 in words is "one billion, four hundred twenty-two million, eight hundred ninety-seven thousand, eight hundred forty".