687274380 has 144 divisors (see below), whose sum is σ = 2262318240. Its totient is φ = 167878656.

The previous prime is 687274363. The next prime is 687274381. The reversal of 687274380 is 83472786.

It is a happy number.

It is a super-3 number, since 3×687274380³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (687274381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 324204 + ... + 326316.

Almost surely, 2^687274380 is an apocalyptic number.

687274380 is a gapful number since it is divisible by the number (60) 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 687274380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131159120).

687274380 is an abundant number, since it is smaller than the sum of its proper divisors (1575043860).

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

687274380 is a wasteful number, since it uses less digits than its factorization.

687274380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280 (or 2275 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 687274380 is about 26215.9184466232. The cubic root of 687274380 is about 882.4905257298.

The spelling of 687274380 in words is "six hundred eighty-seven million, two hundred seventy-four thousand, three hundred eighty".