1913349438 has 512 divisors, whose sum is σ = 6347980800. Its totient is φ = 415704960.

The previous prime is 1913349413. The next prime is 1913349509. The reversal of 1913349438 is 8349433191.

1913349438 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (279936) is a multiple of the sum of its prime factors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1913349393 and 1913349402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 83189095 + ... + 83189117.

It is an arithmetic number, because the mean of its divisors is an integer number (12398400).

Almost surely, 2^1913349438 is an apocalyptic number.

1913349438 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 1913349438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3173990400).

1913349438 is an abundant number, since it is smaller than the sum of its proper divisors (4434631362).

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

1913349438 is a wasteful number, since it uses less digits than its factorization.

1913349438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 78 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1913349438 is about 43741.8499608784. The cubic root of 1913349438 is about 1241.4562837486.

The spelling of 1913349438 in words is "one billion, nine hundred thirteen million, three hundred forty-nine thousand, four hundred thirty-eight".