1210134440 has 32 divisors (see below), whose sum is σ = 2727271080. Its totient is φ = 483259392.

The previous prime is 1210134421. The next prime is 1210134451. The reversal of 1210134440 is 444310121.

It can be written as a sum of positive squares in 4 ways, for example, as 426918244 + 783216196 = 20662^2 + 27986^2 .

It is a super-2 number, since 2×1210134440² = 2928850725748227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 164 + ... + 49196.

Almost surely, 2^1210134440 is an apocalyptic number.

1210134440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210134440 is an abundant number, since it is smaller than the sum of its proper divisors (1517136640).

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

1210134440 is a wasteful number, since it uses less digits than its factorization.

1210134440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49661 (or 49657 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1210134440 is about 34786.9866473082. The cubic root of 1210134440 is about 1065.6417007499.

Adding to 1210134440 its reverse (444310121), we get a palindrome (1654444561).

The spelling of 1210134440 in words is "one billion, two hundred ten million, one hundred thirty-four thousand, four hundred forty".