39706040 has 128 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 13440000.

The previous prime is 39706031. The next prime is 39706049. The reversal of 39706040 is 4060793.

39706040 = T₁₅₈₅ + T₁₅₈₆ + ... + T₁₆₁₅.

It is an interprime number because it is at equal distance from previous prime (39706031) and next prime (39706049).

It is a super-2 number, since 2×39706040² = 3153139224963200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39705994 and 39706012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39706049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 559205 + ... + 559275.

It is an arithmetic number, because the mean of its divisors is an integer number (816480).

Almost surely, 2^39706040 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 39706040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52254720).

39706040 is an abundant number, since it is smaller than the sum of its proper divisors (64803400).

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

39706040 is a wasteful number, since it uses less digits than its factorization.

39706040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 39706040 is about 6301.2728872824. The cubic root of 39706040 is about 341.1553544321.

The spelling of 39706040 in words is "thirty-nine million, seven hundred six thousand, forty".