1913418 has 72 divisors (see below), whose sum is σ = 4881708. Its totient is φ = 539136.

The previous prime is 1913407. The next prime is 1913419. The reversal of 1913418 is 8143191.

It can be written as a sum of positive squares in 6 ways, for example, as 927369 + 986049 = 963^2 + 993^2 .

It is a super-2 number, since 2×1913418² = 7322336885448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (864) is a multiple of the sum of its prime divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 1913391 and 1913400.

It is not an unprimeable number, because it can be changed into a prime (1913419) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51696 + ... + 51732.

2^1913418 is an apocalyptic number.

1913418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1913418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440854).

1913418 is an abundant number, since it is smaller than the sum of its proper divisors (2968290).

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

1913418 is a wasteful number, since it uses less digits than its factorization.

1913418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 72 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 1913418 is about 1383.2635323755. The cubic root of 1913418 is about 124.1471112145.

The spelling of 1913418 in words is "one million, nine hundred thirteen thousand, four hundred eighteen".