1343778990 has 32 divisors (see below), whose sum is σ = 3394811520. Its totient is φ = 339480864.

The previous prime is 1343778959. The next prime is 1343779007. The reversal of 1343778990 is 998773431.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1178184 + ... + 1179323.

It is an arithmetic number, because the mean of its divisors is an integer number (106087860).

Almost surely, 2^1343778990 is an apocalyptic number.

1343778990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1343778990 is an abundant number, since it is smaller than the sum of its proper divisors (2051032530).

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

1343778990 is a wasteful number, since it uses less digits than its factorization.

1343778990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357536.

The product of its (nonzero) digits is 1143072, while the sum is 51.

The square root of 1343778990 is about 36657.5911647233. The cubic root of 1343778990 is about 1103.5091761816.

The spelling of 1343778990 in words is "one billion, three hundred forty-three million, seven hundred seventy-eight thousand, nine hundred ninety".