172431402 has 64 divisors (see below), whose sum is σ = 410852736. Its totient is φ = 47554560.

The previous prime is 172431397. The next prime is 172431409. The reversal of 172431402 is 204134271.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (172431409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61258 + ... + 64010.

It is an arithmetic number, because the mean of its divisors is an integer number (6419574).

Almost surely, 2^172431402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172431402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205426368).

172431402 is an abundant number, since it is smaller than the sum of its proper divisors (238421334).

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

172431402 is a wasteful number, since it uses less digits than its factorization.

172431402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 172431402 is about 13131.3137956565. The cubic root of 172431402 is about 556.5943409845.

Adding to 172431402 its reverse (204134271), we get a palindrome (376565673).

The spelling of 172431402 in words is "one hundred seventy-two million, four hundred thirty-one thousand, four hundred two".