678236940 has 36 divisors (see below), whose sum is σ = 2057319264. Its totient is φ = 180863136.

The previous prime is 678236927. The next prime is 678236953. The reversal of 678236940 is 49632876.

It is an interprime number because it is at equal distance from previous prime (678236927) and next prime (678236953).

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1883812 + ... + 1884171.

Almost surely, 2^678236940 is an apocalyptic number.

678236940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

678236940 is an abundant number, since it is smaller than the sum of its proper divisors (1379082324).

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

678236940 is a wasteful number, since it uses less digits than its factorization.

678236940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767998 (or 3767993 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 678236940 is about 26042.9825480877. The cubic root of 678236940 is about 878.6052889701.

The spelling of 678236940 in words is "six hundred seventy-eight million, two hundred thirty-six thousand, nine hundred forty".