61406436 has 96 divisors (see below), whose sum is σ = 179843328. Its totient is φ = 15874560.

The previous prime is 61406419. The next prime is 61406453. The reversal of 61406436 is 63460416.

It is an interprime number because it is at equal distance from previous prime (61406419) and next prime (61406453).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57346 + ... + 58406.

It is an arithmetic number, because the mean of its divisors is an integer number (1873368).

Almost surely, 2^61406436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61406436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89921664).

61406436 is an abundant number, since it is smaller than the sum of its proper divisors (118436892).

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

61406436 is a wasteful number, since it uses less digits than its factorization.

61406436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 61406436 is about 7836.2258772958. The cubic root of 61406436 is about 394.5220646882.

The spelling of 61406436 in words is "sixty-one million, four hundred six thousand, four hundred thirty-six".