1230255440 has 20 divisors (see below), whose sum is σ = 2860344084. Its totient is φ = 492102144.

The previous prime is 1230255431. The next prime is 1230255449. The reversal of 1230255440 is 445520321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1230255431) and next prime (1230255449).

It can be written as a sum of positive squares in 2 ways, for example, as 204718864 + 1025536576 = 14308^2 + 32024^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230255449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7689017 + ... + 7689176.

Almost surely, 2^1230255440 is an apocalyptic number.

1230255440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230255440 is an abundant number, since it is smaller than the sum of its proper divisors (1630088644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1230255440 is a wasteful number, since it uses less digits than its factorization.

1230255440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15378206 (or 15378200 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1230255440 is about 35074.9973627939. The cubic root of 1230255440 is about 1071.5154350062.

Adding to 1230255440 its reverse (445520321), we get a palindrome (1675775761).

The spelling of 1230255440 in words is "one billion, two hundred thirty million, two hundred fifty-five thousand, four hundred forty".