40231800 has 288 divisors, whose sum is σ = 160942080. Its totient is φ = 8812800.

The previous prime is 40231781. The next prime is 40231801. The reversal of 40231800 is 813204.

40231800 = 318² + 319² + ... + 534².

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40231801) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 390549 + ... + 390651.

Almost surely, 2^40231800 is an apocalyptic number.

40231800 is a gapful number since it is divisible by the number (40) 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 40231800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80471040).

40231800 is an abundant number, since it is smaller than the sum of its proper divisors (120710280).

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

40231800 is a wasteful number, since it uses less digits than its factorization.

40231800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40231800 is about 6342.8542471036. The cubic root of 40231800 is about 342.6545380363.

The spelling of 40231800 in words is "forty million, two hundred thirty-one thousand, eight hundred".