1356678890 has 16 divisors (see below), whose sum is σ = 2790882432. Its totient is φ = 465147024.

The previous prime is 1356678881. The next prime is 1356678901. The reversal of 1356678890 is 988766531.

It is a happy number.

It is a super-2 number, since 2×1356678890² = 3681155221143264200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9690494 + ... + 9690633.

It is an arithmetic number, because the mean of its divisors is an integer number (174430152).

Almost surely, 2^1356678890 is an apocalyptic number.

1356678890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1356678890 is an abundant number, since it is smaller than the sum of its proper divisors (1434203542).

1356678890 is a wasteful number, since it uses less digits than its factorization.

1356678890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19381141.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 1356678890 is about 36833.1221864235. The cubic root of 1356678890 is about 1107.0290625980.

The spelling of 1356678890 in words is "one billion, three hundred fifty-six million, six hundred seventy-eight thousand, eight hundred ninety".