1002681720 has 64 divisors (see below), whose sum is σ = 3342276000. Its totient is φ = 267381504.

The previous prime is 1002681689. The next prime is 1002681721. The reversal of 1002681720 is 271862001.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002681721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 463125 + ... + 465284.

Almost surely, 2^1002681720 is an apocalyptic number.

1002681720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002681720 is an abundant number, since it is smaller than the sum of its proper divisors (2339594280).

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

1002681720 is a wasteful number, since it uses less digits than its factorization.

1002681720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928429 (or 928419 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1002681720 is about 31665.1499285887. The cubic root of 1002681720 is about 1000.8931087859.

The spelling of 1002681720 in words is "one billion, two million, six hundred eighty-one thousand, seven hundred twenty".