1395197440 has 320 divisors, whose sum is σ = 4231979136. Its totient is φ = 429391872.

The previous prime is 1395197437. The next prime is 1395197459. The reversal of 1395197440 is 447915931.

It is a tau number, because it is divible by the number of its divisors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12346824 + ... + 12346936.

Almost surely, 2^1395197440 is an apocalyptic number.

1395197440 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 1395197440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2115989568).

1395197440 is an abundant number, since it is smaller than the sum of its proper divisors (2836781696).

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

1395197440 is a wasteful number, since it uses less digits than its factorization.

1395197440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1395197440 is about 37352.3418275213. The cubic root of 1395197440 is about 1117.4082930681.

The spelling of 1395197440 in words is "one billion, three hundred ninety-five million, one hundred ninety-seven thousand, four hundred forty".