236428969 has 24 divisors (see below), whose sum is σ = 281239368. Its totient is φ = 198132480.

The previous prime is 236428961. The next prime is 236428991. The reversal of 236428969 is 969824632.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 345744 + 236083225 = 588^2 + 15365^2 .

It is not a de Polignac number, because 236428969 - 2³ = 236428961 is a prime.

It is a super-2 number, since 2×236428969² = 111797314764805922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (236428961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 561379 + ... + 561799.

It is an arithmetic number, because the mean of its divisors is an integer number (11718307).

Almost surely, 2^236428969 is an apocalyptic number.

It is an amenable number.

236428969 is a deficient number, since it is larger than the sum of its proper divisors (44810399).

236428969 is a wasteful number, since it uses less digits than its factorization.

236428969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 658 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 49.

The square root of 236428969 is about 15376.2469087876. The cubic root of 236428969 is about 618.3488576459.

The spelling of 236428969 in words is "two hundred thirty-six million, four hundred twenty-eight thousand, nine hundred sixty-nine".