1228396737 has 8 divisors (see below), whose sum is σ = 1644892704. Its totient is φ = 815415968.

The previous prime is 1228396733. The next prime is 1228396739. The reversal of 1228396737 is 7376938221.

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

It is a cyclic number.

It is not a de Polignac number, because 1228396737 - 2² = 1228396733 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228396733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877983 + ... + 879380.

It is an arithmetic number, because the mean of its divisors is an integer number (205611588).

Almost surely, 2^1228396737 is an apocalyptic number.

It is an amenable number.

1228396737 is a deficient number, since it is larger than the sum of its proper divisors (416495967).

1228396737 is a wasteful number, since it uses less digits than its factorization.

1228396737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757599.

The product of its digits is 762048, while the sum is 48.

The square root of 1228396737 is about 35048.4912228758. The cubic root of 1228396737 is about 1070.9755382407.

The spelling of 1228396737 in words is "one billion, two hundred twenty-eight million, three hundred ninety-six thousand, seven hundred thirty-seven".