84406040 has 16 divisors (see below), whose sum is σ = 189913680. Its totient is φ = 33762400.

The previous prime is 84406039. The next prime is 84406043. The reversal of 84406040 is 4060448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84406043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055036 + ... + 1055115.

It is an arithmetic number, because the mean of its divisors is an integer number (11869605).

Almost surely, 2^84406040 is an apocalyptic number.

It is an amenable number.

84406040 is an abundant number, since it is smaller than the sum of its proper divisors (105507640).

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

84406040 is a wasteful number, since it uses less digits than its factorization.

84406040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110162 (or 2110158 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 84406040 is about 9187.2759836635. The cubic root of 84406040 is about 438.6564387367.

Adding to 84406040 its reverse (4060448), we get a palindrome (88466488).

The spelling of 84406040 in words is "eighty-four million, four hundred six thousand, forty".