234157840 has 80 divisors (see below), whose sum is σ = 624995712. Its totient is φ = 79921152.

The previous prime is 234157823. The next prime is 234157841. The reversal of 234157840 is 48751432.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 234157796 and 234157805.

It is not an unprimeable number, because it can be changed into a prime (234157841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143107 + ... + 144733.

Almost surely, 2^234157840 is an apocalyptic number.

234157840 is a gapful number since it is divisible by the number (20) 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 234157840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312497856).

234157840 is an abundant number, since it is smaller than the sum of its proper divisors (390837872).

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

234157840 is a wasteful number, since it uses less digits than its factorization.

234157840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904 (or 1898 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 234157840 is about 15302.2168328644. The cubic root of 234157840 is about 616.3625374777.

The spelling of 234157840 in words is "two hundred thirty-four million, one hundred fifty-seven thousand, eight hundred forty".