16432240 has 80 divisors (see below), whose sum is σ = 42425856. Its totient is φ = 5868800.

The previous prime is 16432153. The next prime is 16432243. The reversal of 16432240 is 4223461.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×16432240² = 540037022835200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16432243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62349 + ... + 62611.

Almost surely, 2^16432240 is an apocalyptic number.

16432240 is a gapful number since it is divisible by the number (10) 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 16432240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21212928).

16432240 is an abundant number, since it is smaller than the sum of its proper divisors (25993616).

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

16432240 is a wasteful number, since it uses less digits than its factorization.

16432240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 16432240 is about 4053.6699421635. The cubic root of 16432240 is about 254.2331956393.

It can be divided in two parts, 1643 and 2240, that added together give a palindrome (3883).

The spelling of 16432240 in words is "sixteen million, four hundred thirty-two thousand, two hundred forty".