1234354440 has 128 divisors (see below), whose sum is σ = 4048081920. Its totient is φ = 298617600.

The previous prime is 1234354427. The next prime is 1234354453. The reversal of 1234354440 is 444534321.

It is an interprime number because it is at equal distance from previous prime (1234354427) and next prime (1234354453).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1234354398 and 1234354407.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1196725 + ... + 1197755.

It is an arithmetic number, because the mean of its divisors is an integer number (31625640).

Almost surely, 2^1234354440 is an apocalyptic number.

1234354440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1234354440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2024040960).

1234354440 is an abundant number, since it is smaller than the sum of its proper divisors (2813727480).

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

1234354440 is a wasteful number, since it uses less digits than its factorization.

1234354440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963 (or 1959 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 1234354440 is about 35133.3807083805. The cubic root of 1234354440 is about 1072.7041509646.

Adding to 1234354440 its reverse (444534321), we get a palindrome (1678888761).

The spelling of 1234354440 in words is "one billion, two hundred thirty-four million, three hundred fifty-four thousand, four hundred forty".