234181840 has 40 divisors (see below), whose sum is σ = 573132960. Its totient is φ = 88742016.

The previous prime is 234181819. The next prime is 234181841. The reversal of 234181840 is 48181432.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×234181840² = 109682268371571200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234181841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75514 + ... + 78553.

It is an arithmetic number, because the mean of its divisors is an integer number (14328324).

Almost surely, 2^234181840 is an apocalyptic number.

234181840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

234181840 is an abundant number, since it is smaller than the sum of its proper divisors (338951120).

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

234181840 is a wasteful number, since it uses less digits than its factorization.

234181840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154099 (or 154093 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 234181840 is about 15303.0010128733. The cubic root of 234181840 is about 616.3835947775.

Subtracting from 234181840 its sum of digits (31), we obtain a square (234181809 = 15303²).

The spelling of 234181840 in words is "two hundred thirty-four million, one hundred eighty-one thousand, eight hundred forty".