1392195840 has 360 divisors, whose sum is σ = 5221422528. Its totient is φ = 316108800.

The previous prime is 1392195839. The next prime is 1392195859. The reversal of 1392195840 is 485912931.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1392195792 and 1392195801.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9219765 + ... + 9219915.

Almost surely, 2^1392195840 is an apocalyptic number.

1392195840 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 1392195840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2610711264).

1392195840 is an abundant number, since it is smaller than the sum of its proper divisors (3829226688).

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

1392195840 is an frugal number, since it uses more digits than its factorization.

1392195840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 1392195840 is about 37312.1406515359. The cubic root of 1392195840 is about 1116.6063944103.

The spelling of 1392195840 in words is "one billion, three hundred ninety-two million, one hundred ninety-five thousand, eight hundred forty".