102787438 has 16 divisors (see below), whose sum is σ = 166224240. Its totient is φ = 47388096.

The previous prime is 102787427. The next prime is 102787439. The reversal of 102787438 is 834787201.

It is a self number, because there is not a number n which added to its sum of digits gives 102787438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102787439) 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, 31981 + ... + 35047.

It is an arithmetic number, because the mean of its divisors is an integer number (10389015).

Almost surely, 2^102787438 is an apocalyptic number.

102787438 is a deficient number, since it is larger than the sum of its proper divisors (63436802).

102787438 is a wasteful number, since it uses less digits than its factorization.

102787438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 102787438 is about 10138.4139785274. The cubic root of 102787438 is about 468.4321348886.

The spelling of 102787438 in words is "one hundred two million, seven hundred eighty-seven thousand, four hundred thirty-eight".