1900072 has 8 divisors (see below), whose sum is σ = 3562650. Its totient is φ = 950032.

The previous prime is 1900049. The next prime is 1900079. The reversal of 1900072 is 2700091.

It can be written as a sum of positive squares in only one way, i.e., 1313316 + 586756 = 1146^2 + 766^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1900072² = 7220547210368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1900079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118747 + ... + 118762.

2^1900072 is an apocalyptic number.

It is an amenable number.

1900072 is a deficient number, since it is larger than the sum of its proper divisors (1662578).

1900072 is a wasteful number, since it uses less digits than its factorization.

1900072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237515 (or 237511 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 1900072 is about 1378.4309921066. The cubic root of 1900072 is about 123.8577974430.

Adding to 1900072 its sum of digits (19), we get a palindrome (1900091).

The spelling of 1900072 in words is "one million, nine hundred thousand, seventy-two".