81462430 has 32 divisors (see below), whose sum is σ = 169712640. Its totient is φ = 27574560.

The previous prime is 81462401. The next prime is 81462439. The reversal of 81462430 is 3426418.

It is a super-2 number, since 2×81462430² = 13272255003009800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81462439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1836 + ... + 12895.

It is an arithmetic number, because the mean of its divisors is an integer number (5303520).

Almost surely, 2^81462430 is an apocalyptic number.

81462430 is an abundant number, since it is smaller than the sum of its proper divisors (88250210).

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

81462430 is a wasteful number, since it uses less digits than its factorization.

81462430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14824.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 81462430 is about 9025.6539929248. The cubic root of 81462430 is about 433.4966912039.

Adding to 81462430 its reverse (3426418), we get a palindrome (84888848).

The spelling of 81462430 in words is "eighty-one million, four hundred sixty-two thousand, four hundred thirty".