64431234 has 64 divisors (see below), whose sum is σ = 170772480. Its totient is φ = 17606160.

The previous prime is 64431221. The next prime is 64431239. The reversal of 64431234 is 43213446.

64431234 is a `hidden beast` number, since 644 + 3 + 12 + 3 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64431198 and 64431207.

It is not an unprimeable number, because it can be changed into a prime (64431239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4989 + ... + 12399.

It is an arithmetic number, because the mean of its divisors is an integer number (2668320).

Almost surely, 2^64431234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64431234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85386240).

64431234 is an abundant number, since it is smaller than the sum of its proper divisors (106341246).

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

64431234 is a wasteful number, since it uses less digits than its factorization.

64431234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452 (or 7446 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 64431234 is about 8026.9068762507. The cubic root of 64431234 is about 400.8963938612.

It can be divided in two parts, 644 and 31234, that added together give a triangular number (31878 = T₂₅₂).

The spelling of 64431234 in words is "sixty-four million, four hundred thirty-one thousand, two hundred thirty-four".