1378078090 has 8 divisors (see below), whose sum is σ = 2480540580. Its totient is φ = 551231232.

The previous prime is 1378078087. The next prime is 1378078139. The reversal of 1378078090 is 908708731.

It can be written as a sum of positive squares in 2 ways, for example, as 1375890649 + 2187441 = 37093^2 + 1479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68903895 + ... + 68903914.

Almost surely, 2^1378078090 is an apocalyptic number.

1378078090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1378078090 is a deficient number, since it is larger than the sum of its proper divisors (1102462490).

1378078090 is a wasteful number, since it uses less digits than its factorization.

1378078090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137807816.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 1378078090 is about 37122.4741901722. The cubic root of 1378078090 is about 1112.8191978908.

The spelling of 1378078090 in words is "one billion, three hundred seventy-eight million, seventy-eight thousand, ninety".