1555947432 has 192 divisors, whose sum is σ = 4721196480. Its totient is φ = 459841536.

The previous prime is 1555947427. The next prime is 1555947433. The reversal of 1555947432 is 2347495551.

1555947432 is a `hidden beast` number, since 1 + 55 + 594 + 7 + 4 + 3 + 2 = 666.

It is a super-4 number, since 4×1555947432⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1555947433) 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, 2696328 + ... + 2696904.

It is an arithmetic number, because the mean of its divisors is an integer number (24589565).

Almost surely, 2^1555947432 is an apocalyptic number.

1555947432 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 1555947432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2360598240).

1555947432 is an abundant number, since it is smaller than the sum of its proper divisors (3165249048).

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

1555947432 is a wasteful number, since it uses less digits than its factorization.

1555947432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 705 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 1555947432 is about 39445.4995151538. The cubic root of 1555947432 is about 1158.7728381949.

The spelling of 1555947432 in words is "one billion, five hundred fifty-five million, nine hundred forty-seven thousand, four hundred thirty-two".