1395195840 has 280 divisors, whose sum is σ = 5226009360. Its totient is φ = 352346112.

The previous prime is 1395195817. The next prime is 1395195863. The reversal of 1395195840 is 485915931.

1395195840 is a `hidden beast` number, since 13 + 9 + 51 + 9 + 584 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1395195817) and next prime (1395195863).

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

It is a congruent number.

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, 491064 + ... + 493896.

Almost surely, 2^1395195840 is an apocalyptic number.

1395195840 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 1395195840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2613004680).

1395195840 is an abundant number, since it is smaller than the sum of its proper divisors (3830813520).

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

1395195840 is a wasteful number, since it uses less digits than its factorization.

1395195840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881 (or 2862 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 1395195840 is about 37352.3204098487. The cubic root of 1395195840 is about 1117.4078659233.

The spelling of 1395195840 in words is "one billion, three hundred ninety-five million, one hundred ninety-five thousand, eight hundred forty".