1677818394 has 128 divisors (see below), whose sum is σ = 4436213760. Its totient is φ = 459950400.

The previous prime is 1677818381. The next prime is 1677818407. The reversal of 1677818394 is 4938187761.

It is an interprime number because it is at equal distance from previous prime (1677818381) and next prime (1677818407).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1677818394.

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, 1534512 + ... + 1535604.

It is an arithmetic number, because the mean of its divisors is an integer number (34657920).

Almost surely, 2^1677818394 is an apocalyptic number.

1677818394 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1677818394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2218106880).

1677818394 is an abundant number, since it is smaller than the sum of its proper divisors (2758395366).

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

1677818394 is a wasteful number, since it uses less digits than its factorization.

1677818394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273 (or 1267 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 1677818394 is about 40961.1815503410. The cubic root of 1677818394 is about 1188.2695924236.

The spelling of 1677818394 in words is "one billion, six hundred seventy-seven million, eight hundred eighteen thousand, three hundred ninety-four".