47345664 has 52 divisors (see below), whose sum is σ = 126272456. Its totient is φ = 15777792.

The previous prime is 47345651. The next prime is 47345677. The reversal of 47345664 is 46654374.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (47345651) and next prime (47345677).

It is a super-2 number, since 2×47345664² = 4483223799201792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10362 + ... + 14214.

Almost surely, 2^47345664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47345664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63136228).

47345664 is an abundant number, since it is smaller than the sum of its proper divisors (78926792).

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

47345664 is an equidigital number, since it uses as much as digits as its factorization.

47345664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880 (or 3858 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 47345664 is about 6880.8185559568. The cubic root of 47345664 is about 361.7651580621.

The spelling of 47345664 in words is "forty-seven million, three hundred forty-five thousand, six hundred sixty-four".