1229156798 has 8 divisors (see below), whose sum is σ = 1893565992. Its totient is φ = 597968136.

The previous prime is 1229156749. The next prime is 1229156827. The reversal of 1229156798 is 8976519221.

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

It is a super-2 number, since 2×1229156798² = 3021652868139225608, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 8305040 + ... + 8305187.

It is an arithmetic number, because the mean of its divisors is an integer number (236695749).

Almost surely, 2^1229156798 is an apocalyptic number.

1229156798 is a deficient number, since it is larger than the sum of its proper divisors (664409194).

1229156798 is a wasteful number, since it uses less digits than its factorization.

1229156798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16610266.

The product of its digits is 544320, while the sum is 50.

The square root of 1229156798 is about 35059.3325378565. The cubic root of 1229156798 is about 1071.1963786486.

The spelling of 1229156798 in words is "one billion, two hundred twenty-nine million, one hundred fifty-six thousand, seven hundred ninety-eight".