40534390 has 16 divisors (see below), whose sum is σ = 78574608. Its totient is φ = 14966496.

The previous prime is 40534387. The next prime is 40534399. The reversal of 40534390 is 9343504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40534399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155772 + ... + 156031.

It is an arithmetic number, because the mean of its divisors is an integer number (4910913).

Almost surely, 2^40534390 is an apocalyptic number.

40534390 is a deficient number, since it is larger than the sum of its proper divisors (38040218).

40534390 is a wasteful number, since it uses less digits than its factorization.

40534390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311823.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 40534390 is about 6366.6623909235. The cubic root of 40534390 is about 343.5114470512.

Adding to 40534390 its reverse (9343504), we get a palindrome (49877894).

The spelling of 40534390 in words is "forty million, five hundred thirty-four thousand, three hundred ninety".