1043687664 has 180 divisors, whose sum is σ = 3206848320. Its totient is φ = 316477440.

The previous prime is 1043687627. The next prime is 1043687669. The reversal of 1043687664 is 4667863401.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043687669) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1289692 + ... + 1290500.

It is an arithmetic number, because the mean of its divisors is an integer number (17815824).

Almost surely, 2^1043687664 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 1043687664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603424160).

1043687664 is an abundant number, since it is smaller than the sum of its proper divisors (2163160656).

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

1043687664 is a wasteful number, since it uses less digits than its factorization.

1043687664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 1043687664 is about 32306.1552029950. The cubic root of 1043687664 is about 1014.3554884903.

The spelling of 1043687664 in words is "one billion, forty-three million, six hundred eighty-seven thousand, six hundred sixty-four".