1678274520 has 256 divisors, whose sum is σ = 5620285440. Its totient is φ = 398297088.

The previous prime is 1678274519. The next prime is 1678274537. The reversal of 1678274520 is 254728761.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8519062 + ... + 8519258.

It is an arithmetic number, because the mean of its divisors is an integer number (21954240).

Almost surely, 2^1678274520 is an apocalyptic number.

1678274520 is a gapful number since it is divisible by the number (10) 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 1678274520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2810142720).

1678274520 is an abundant number, since it is smaller than the sum of its proper divisors (3942010920).

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

1678274520 is a wasteful number, since it uses less digits than its factorization.

1678274520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 1678274520 is about 40966.7489557080. The cubic root of 1678274520 is about 1188.3772623101.

The spelling of 1678274520 in words is "one billion, six hundred seventy-eight million, two hundred seventy-four thousand, five hundred twenty".