678992652 has 72 divisors (see below), whose sum is σ = 1906230480. Its totient is φ = 208915200.

The previous prime is 678992651. The next prime is 678992653. The reversal of 678992652 is 256299876.

It is an interprime number because it is at equal distance from previous prime (678992651) and next prime (678992653).

It is a super-2 number, since 2×678992652² = 922062042939986208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (678992651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349 + ... + 36852.

Almost surely, 2^678992652 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 678992652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (953115240).

678992652 is an abundant number, since it is smaller than the sum of its proper divisors (1227237828).

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

678992652 is a wasteful number, since it uses less digits than its factorization.

678992652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37240 (or 37219 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 678992652 is about 26057.4874460298. The cubic root of 678992652 is about 878.9314906593.

The spelling of 678992652 in words is "six hundred seventy-eight million, nine hundred ninety-two thousand, six hundred fifty-two".