1391627952 has 240 divisors, whose sum is σ = 4746862848. Its totient is φ = 389111040.

The previous prime is 1391627947. The next prime is 1391627957. The reversal of 1391627952 is 2597261931.

It is a happy number.

1391627952 is a `hidden beast` number, since 13 + 9 + 1 + 627 + 9 + 5 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1391627947) and next prime (1391627957).

It is a junction number, because it is equal to n+sod(n) for n = 1391627898 and 1391627907.

It is not an unprimeable number, because it can be changed into a prime (1391627957) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 554733 + ... + 557235.

Almost surely, 2^1391627952 is an apocalyptic number.

1391627952 is a gapful number since it is divisible by the number (12) 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 1391627952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2373431424).

1391627952 is an abundant number, since it is smaller than the sum of its proper divisors (3355234896).

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

1391627952 is a wasteful number, since it uses less digits than its factorization.

1391627952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550 (or 2532 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 1391627952 is about 37304.5299125991. The cubic root of 1391627952 is about 1116.4545494872.

The spelling of 1391627952 in words is "one billion, three hundred ninety-one million, six hundred twenty-seven thousand, nine hundred fifty-two".