1349694280 has 128 divisors (see below), whose sum is σ = 3479604480. Its totient is φ = 466385920.

The previous prime is 1349694259. The next prime is 1349694361. The reversal of 1349694280 is 824969431.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 1349694280.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1993302 + ... + 1993978.

It is an arithmetic number, because the mean of its divisors is an integer number (27184410).

Almost surely, 2^1349694280 is an apocalyptic number.

1349694280 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 1349694280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1739802240).

1349694280 is an abundant number, since it is smaller than the sum of its proper divisors (2129910200).

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

1349694280 is a wasteful number, since it uses less digits than its factorization.

1349694280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 915 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 1349694280 is about 36738.1855839398. The cubic root of 1349694280 is about 1105.1260149892.

The spelling of 1349694280 in words is "one billion, three hundred forty-nine million, six hundred ninety-four thousand, two hundred eighty".