61408340 has 24 divisors (see below), whose sum is σ = 147380352. Its totient is φ = 21054240.

The previous prime is 61408339. The next prime is 61408363. The reversal of 61408340 is 4380416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219176 + ... + 219455.

It is an arithmetic number, because the mean of its divisors is an integer number (6140848).

Almost surely, 2^61408340 is an apocalyptic number.

It is an amenable number.

61408340 is an abundant number, since it is smaller than the sum of its proper divisors (85972012).

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

61408340 is a wasteful number, since it uses less digits than its factorization.

61408340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438647 (or 438645 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 61408340 is about 7836.3473634085. The cubic root of 61408340 is about 394.5261422317.

Adding to 61408340 its reverse (4380416), we get a palindrome (65788756).

The spelling of 61408340 in words is "sixty-one million, four hundred eight thousand, three hundred forty".