39499740 has 288 divisors, whose sum is σ = 150958080. Its totient is φ = 8160768.

The previous prime is 39499739. The next prime is 39499741. The reversal of 39499740 is 4799493.

It is an interprime number because it is at equal distance from previous prime (39499739) and next prime (39499741).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39499741) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 840397 + ... + 840443.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^39499740 is an apocalyptic number.

39499740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39499740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75479040).

39499740 is an abundant number, since it is smaller than the sum of its proper divisors (111458340).

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

39499740 is a wasteful number, since it uses less digits than its factorization.

39499740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 39499740 is about 6284.8818604648. The cubic root of 39499740 is about 340.5634831533.

It can be divided in two parts, 3949 and 9740, that added together give a square (13689 = 117²).

The spelling of 39499740 in words is "thirty-nine million, four hundred ninety-nine thousand, seven hundred forty".